On Jan. 14, Marvel Comics is releasing a special issue of Amazing Spider-Man #583 with Obama depicted on the cover. Inside are five pages of the two teaming up and even a fist-bump between Spidey and the new president.
And you can get this comic at your local neighborhood comic shop. Mine is Arcane Comics & More. You better get it when it comes out on Wednesday though because its already up on e-bay for $15.00. (I refuse to link to e-bay auctions gouging people for a comic that hasn't even hit the stands yet.
update 1/10/09: Added cover image