EDIT:
I've been adding new ones surreptitiously and not 'informing you' (read: spamming) when I do, but this one was just too funny:

RMC: "You should give Clio spam for Christmas."
VLC: "She'd be like, I'm a vegetarian, what is this? I should give some to Thomas; he'd actually eat it." pause "Oh wait, he's Jewish."
TLC: "So give it to him for Hanukkah."

"There are lots of Asian people in China" -*Negated

"My English teacher is taking this extremism thing a little too far" -~devilsquirrel

"" Democratic White House contender Barack Obama could not hide his irritation Monday when asked by a reporter what he thought about former president Jimmy Carter's meeting with Hamas last week.

"Why can't I just eat my waffle?" the Illinois senator said as he ate breakfast in Scranton, Pennsylvania, according to MSNBC television pictures.

Pressed again for an answer, he replied: "Just let me eat my waffle."" -Newsvine

"For over five years this man has been chasing around Europe like a madman in search of something he could set on fire. Unfortunately, he again and again finds hirelings who open the gates of their country to this international incendiary" -Hitler, speaking about Churchill (no, that's not a typo).

"The period that followed is often called the First Hundred Days because (1) that's how long it lasted..." -My U.S. History AP Prep book (Princeton Review)

"Never doubt the courage of the French[;] they are the ones who discovered snails are edible" -Doug Larson

"Mr. Webb is an indifferent campaigner. His speeches are awkward, he clearly dislikes all the flesh-pressing, and he looks like an angry potato." -The Economist, 6/21/08, p. 46

"They are full of the wine of life. But they have not tasted the cup--let us call it the teacup--of experience" -E.M. Forster, in The Longest Journey

"'He's a trifle weird.'" -E.M. Forster, in The Longest Journey

"you don't get to be No. 3 of an authoritarian regime and to survive [sic] numerous purges by being nice" Maochun Yu, quoted in the Week, 6/27/2008, p. 16.

"We're going to send Jessica Simpson to the Democratic National Convention" -President Bush

"...the intellectual godfather of al Qaida..." -Noah Feldman

The other day, I was in the kitchen, and my father said something about Obama. My sister was there too. Keep in mind: my sister is nine years old. So he says to her: "But you support Hillary Clinton, don't you?" And she--remember, she's nine--responds: "Hillary Clinton is out of the race. I support Obama!" Wow.

"In the olden days, English speakers said 'thou' and 'you'. People said 'thou' to their beloved and 'you to their beloved's parents." -Spanish For Dummies book, p. 38.

I'll add to this as I find more. People say the silliest stuff...oh, and wish me luck on my APs!