PdF 2008 was the hot topic on Twitter today. More than anything else, the Twittering class wanted to chat about Clay Shirky, Linkfluence, and Elizabeth Edwards.

Don't believe me? Check out Twitscoop for the goods.

They're back! I have to admit, ever since they were unmasked as phonies a few months back, I've been pining away for the McCain Girls. Those off-by-a-half-note harmonies, off-kilter dance moves, and fantastically bad special effects all had a special charm.

John McCain takes a drubbing on YouTube; the conservative blogosphere and Obama's Auschwitz "gaffe"; Congress, Franking Rules, and wikis; the Forum on Participation and Politics Online is next week; your humble Daily Digester passes the baton; and Newt gets 100,000 signatures on a domestic oil drilling petition.

This Sunday is the Puerto Rico Primary, and the Democratic candidates are doing their best to show their inner Puerto Rican-ness by dancing in the streets, drinking the local beer, and speaking accented Spanish. We’ll see how they fare on Sunday. Also, a curious Memorial Day message from John McCain and a glimpse at Hillary Clinton’s early life in elementary school.

A Digg-style site lets Obama supporters make suggestions to the campaign; a video of a Young Hillary Clinton; who, exactly, are these online Republicans we hear about?; Click 4 Obama makes a political FreeRice site; Causes posts some big numbers; and the RNC launches a Obama Iraq countdown clock.

A fake superdelegate on YouTube; Hillary can't catch a break online; Grover Norquist shows up in the RNC's "Can We Ask" campaign; graphic designers get out the vote; new speakers announced for PdF 2008; John McCain shores up his tech policy; a McCain adviser answers Wired readers' questions; Hillary's t-shirt contest enters the voting stage; Ron Paul's been employing tons of family members; and a Member of Congress uses Qik.

The Next Right launches; is Slatecard the "Republican ActBlue"?; Hillary Clinton's bad day; it's the network, stupid; Barack Obama is the jukebox favorite; Al Franken continues to get hounded by bloggers; Newt Gingrich hints at a 2012 or 2016 run; and Hillary and Barack dance in Puerto Rico.

You may not know it, but it's convention season. For the Libertarian Party, anyway. Bob Barr is livestreaming from his booth at the event, and while there's nothing exciting happening at the moment, it's pretty cool that his campaign is into this stuff.

David Brooks talks about geeks, tech, and politics; dreams of an Obama-Webb ticket; CQ's VP contest is over, and the winner is...; a new study suggests that HuffPo readers aren't as homogeneous as you think; two new projects hope to produce quality journalism with the help of their readers; chat with Obama fans on FriendFeed; the RNC launches a cool video contest; and anti-Mitch McConnell ads on two cheap gas sites.

Just in time for the Memorial Day holiday, we bring you eight political videos that are guaranteed to stick to your consciousness like ketchup on a burger. You can never escape the tubes!