Rob Loukotka did this last year and folks seemed to dig it. So this year he is doing a 11 x 14" print that's free for any order at all today June 14th. Basically if you buy one of his other posters, prints, housewares, etc. then you will get this print fo' free.
Last year he did 8x8" giveaways before, so this years is bigger. Signed / numbered / edition size based on sales today.