Definitely Running, Yes:
Sam Brownback, Senator from Kansas. Supports Congressional term limits; calls the number of abortions since Roe v. Wade "a holocaust"; supports a Constitutional amendment outlawing gay marriage AND civil unions; supports "teaching the controversy" surrounding intelligent design in public school science classes. Notable quote: "No raise money, no get bonus."
I don't eat Domino's Pizza because the founder, Tom Monaghan, is a creepy pro-lifer who builds religious towns - so I'm sure not going to vote for the guy he wants to see elected President.
John Cox, businessman and radio host. Website touts him as the candidate "you've probably never heard of"; unsuccessfully ran for state office in Illinois in 2000 and 2002, not making it past the Republican primaries, and also lost in 2004 in the race for Cook County Recorder of Deeds; is basically just a rich dude from Illinois who visits Iowa a lot. Notable quote: "We must wing the war in Iraq and elsewhere so we are fighting terror over there, not over here." I'm not entirely sure what that means, but it's on his official website.
He's like a cliche of a conservative Republican ... I guess he's running so people will look at him for five minutes.
Jim Gilmore, former Governor of Virginia. He's a tough crime-buster! He hates terrorism! He likes guns! Um, he's another Republican candidate. Notable quote: "Jim Gilmore is a leader."
Jim Gilmore is totally vague about everything. Jim Gilmore put his hand on the Bible when he swore the Oath of Office.
Rudy Giuliani, former Mayor of New York City. He'll be tough like your dad on terror; doesn't absolutely hate people; one of like two pro-choice Republicans I know; vindictive and jealous; hates ferrets and free speech; is a knight. Notable quote: "Mayor Giuliani will do everything possible to cleanse this city of this falsified non-fat yogurt."
I don't really understand the people who think Giuliani won't win the Republican nomination because of his stance on social issues - despite the fact that George W. Bush SOUNDS like an idiot, have we all forgotten that the Republicans are really, really smart? America is pretty tired of Bush's particular brand of right-wing conservatism and Iraq-fighting - making Giuliani the perfect candidate for the Republicans. He's not creepily religious, but he's still got the tough-dad thing going on. Plenty of New Yorkers thought he was the devil incarnate by September 10, 2001, but the rest of the country still sees him as "America's Mayor." He hates homeless people, supports police brutality, and sees it as his job to shut down art and artists he doesn't agree with. He'll rope-a-dope Hillary if he squares off with her in a general election, and he'd out-Bush Bush on civil liberties as President. Hell, he'll out-Ashcroft Ashcroft. Not because of the Bible - but because Giuliani Thinks He's Right. Beware - beware! - Rudy Giuliani!
Mike Huckabee, former Governor of Arkansas. Lost 110 lbs. (!) after being diagnosed with diabetes; believes in creationism; named one of Time's five best governors in 2005. Notable quote: "I liked gravy poured on top of a big glob of mashed potatoes, I liked biscuits a lot."
Mike Huckabee, the rational choice! If Giuliani or Zombie McCain do anything particular crazy between now and the primaries (which is really, really likely), Huckabee might be the guy who steps in to say, "Well, at least I'm not crazy." He's a Republican candidate in the mold of easily defeated Democratic candidates.
Duncan Hunter, Representative from California (San Diego). Led the building of a 14-mile fence separating San Diego Country and Tijuana, Mexico, and subsequently supported a reinforced force along the entire US/Mexican border; supports sending more troops to Iraq. Notable quote: "This century is going to be a very dangerous century."
The latest in a long line of Republicans legislating hate and fear!
John McCain, Senator from Arizona. Creepier than ever, in a zombie kind of way; totally, totally, totally old; less "maverick" and more "I'll say anything you want if you will vote for me." Notable quote: "Why is Chelsea Clinton so ugly? Because her father is Janet Reno." This is really a thing that he said.
McCain is old. He is old, and he is desperate to be your friend. He's the political equivalent of your grandpa, desperate for you stay at the nursing home just a little longer. He was kind of neat, as far as Republicans go, eight years ago - now he's just evil, and sad. And not in that order.
Ron Paul, Representative from Texas. Website is, actually, "ronpaulexplore.com" - very utilitarian, very "I've never heard of the internet; a non-interventionist, opposed to the Iraq War; a lifetime member of the Libertarian Party. Notable quote: "It's still fashionable to dislike McDonald's."
The dude's a Libertarian. He's pro-life, but doesn't support federal laws banning abortion - he supports legalization of medical marijuana - he's a small government guy in a big government party.
Mitt Romney, former Governor of Massachusetts. Looks like an actor playing the President on TV; believes in magic underwear; in favor of stem-cell research; believes life begins during humping. Notable quote: "The buck stops all the way up the chain."
I dunno ... he's a careful guy. He's very aware of his public image the potential hurdles of running for President as a Mormon. He's another one who has the opportunity to step into the breach if the front-runners do anything wacky. Then again, something like a particularly clever debate performance could put him over someone like Giuliani, who would be more likely to say something sloppy and off the cuff than Romney would. Romney strikes me like Hillary in that way - he's more careful than he is passionate.
Tom Tancredo, Representative from Colorado. Against abortion under any circumstances; delivered a banner and cards from Columbine students to children in Beslan, Russia after the Beslan school hostage crisis; supports current immigration laws and opposes Bush's proposed reforms; Karl Rove once yelled at him and called him a "traitor to the party." Notable quote: "I certainly understand and appreciate your need and desire to try and create the illusion of Miami as a multiethnic 'All American' city."
"Wait Wait Don't Tell Me" declared him as the "Hopeless Republican Candidate," as the counterpart to Kucinich as the "Hopeless Democratic Candidate." And after filling out this entry, all I can tell you is ... that says a lot.
Tommy Thompson, former Governor of Wisconsin. Supports the creation of three distinct Iraqi states; Elizabeth Dole likes him; um, that's roughly it. Notable quote: "For the life of me, I cannot understand why the terrorists have not attacked our food supply because it is so easy to do."
Ummm. I guess he has money to burn? Or maybe he's angling for a VP or cabinet nomination.
Definitely Maybe Running:
Newt Gingrich, former Representative from Georgia. Not-so-quietly waiting to make a late splash, and/or run as a third-party candidate; totally made a Contract with America; resigned from Congress on account of being a dick. Notable quote: "The idea that a congressman would be tainted by accepting money from private industry or private sources is essentially a socialist argument." Alternate quote: "Mr. President, we are going to run you out of town."
In my fondest dreams, Newt will be the great spoiler of 2008 - siphoning off conservative votes from the Republican candidate as he runs as a third-party candidate. In the real world, I think he'll announce in the summer as a Republican candidate, or early next year as a third-party candidate, and no one will really notice.