The Buzz Lightyear, Jessie, and Woody character posters for Toy Story 3 have now debuted online, at Yahoo! Movies, ComingSoon.net, and Moviefone, respectively.
My favourite of these is definitely the Woody one at top. It's cool and shiny, but retains a classic feel to it because of Woody's cowboy pose. They're all very nice, in fact. This post replaces the post previously at this URL which featured only the Buzz poster.