Kickstarter is a popular crowdfunding site. It became relevant for the Order of the Stick comics when a Kickstarter for the reprinting of the OotS books was inaugurated at January 22nd, 2012.
The pledge was wildly succesful, raising $1,254,120 in American Dollars. 14952 people backed it.
A wide variety of rewards were offered and have been gradually given as rewards for participation in the Kickstarter.
The $5000 contribution reward was described as Your original D&D character, based on your descriptions (within reason), gets a walk-on cameo in The Order of the Stick webcomic sometime this year. Plus, you get an original signed crayon drawing of that character, an autographed copy of War and XPs, and the Roy Greenhilt magnet. The original character turned out to be Veldrina and was upgrade from the original cameo to an integral part of the story of book 6.