Name listed in "thank you" screen plus cool Pirate Kart charms made to look like actual video game cartridges! (made by Zoe Quinn! Here are some examples of other charms she's made: http://i53.tinypic.com/16a2wlf.jpg )
All of the above! You get your name listed in the "thank you" screen, a Pirate Kart poster, a Pirate Kart T-shirt, a copy of Galcon Fusion, AND the Glorious Trainwrecks community will make a game matching a short description you provide!
A SONG IN YOUR HONOR: A recording of a personalized sea chanty in your honor by Jeremy Penner (founder of Glorious Trainwrecks!) and his accordion! (sample: http://sporktania.com/lal/LaL-The_Spittunian_Polka.mp3) (and your name in thank you screen of course!)
HOLY CRAP. You blow our minds! Your name will appear in the "thank you" screen AND we'll thank you in the "company description" for the kart in the expo Show Program, the GDC Play page, and put the url of your choice in the Kart's
company listing on the GDC Play page!