GEORGE R. R. MARTIN is the author of the book series that "Game of Thrones" is based on, and he's raising money for a wolf sanctuary. He's set up an account through Prizeo.com to raise money through donations.
If you want to throw down $20,000 he'll even name character after you in future installments of the series. And of course, you'll character will meet a "grisly death".
Plenty of other prizes available for smaller donations too!