Someone* who thinks it could be Florida Senator Bill Nelson notes that if you try http://www.obamanelson.com, it takes you to the Obama campaign website. Not true for obamabiden or obamabayh. I also tried obamasebelius and obamareed.
*H/T: Michael Cialdella, former Bob Dole campaign staffer, as relayed to our Kristina Dell
UPDATE: Commenter Superterrificdelegate has figured it out, and if he’s right, McCain can pack it up. The election is over: