The hivemind predicts the future
HT: Mad Latinist from the comments. My favorite method of figuring out who the vice presidential picks would be is by tracking flight plans for charter planes. Ambinder did it with Biden, Abulsme.com did it for Palin. If you want to play the game yourself, (say, when McCain dumps Palin (13% on Intrade as of this posting) and speculation runs rampant on who will replace her) you can go here.
In the days leading up to Republican presidential candidate John McCain's running mate announcement, political junkies glued to broadcasts and blogs for clues of McCain's veep choice might have done better to keep a sharp eye on each candidate's Wikipedia entry.
Just hours before McCain declared his veep choice of Alaska Gov. Sarah Palin, her Wiki page saw a flurry of activity, with editors adding details about her approval rating and husband's employment. Perhaps more tellingly, some of the same users editing her page were almost simultaneously updating McCain's Wiki entry, adding information dealing with accuracy, sources and footnotes to each.