I was asked to donate art to the Comic Book Legal Defense Fund auction. It will be held at the Comix Experience store during WonderCon in San Francisco in a couple of weeks. The only requirement they asked is that the art have something to do with the number 21, since it is the 21st anniversary of Comix Experience. They were also thinking of collecting the donated drawings in a mini-comic, to benefit the charity.
I won't be at WonderCon (as I've already committed to 3 events in April) but, if you'll be there, the auction will be taking place at an anniversary bash at the store.