This year's winner was The Night Peeps, seen below:
Follow this link to see the 40 finalists (and just below it on the page is a link to last year's finalists). They aren't all as brilliant as this one (or the peep chickens hanging in the window of the Chinese restaurant) but they are worth the trip.
And I think I may need the Woodstock poster as a desktop. After all, Woodstock was my 17th birthday!