Patrick Rothfuss, author of The Name of the Wind, is doing a fundraiser for the Heifer Project, an effort to provide people in third-world countries with both livestock and the training to care for them as a renewable resource. Lots of authors have contributed various things for auction, including me:
I donated this premiere issue of Spectra Pulse magazine signed by authors George R.R. Martin, Jeff VanderMeer, Elizabeth Bear, and Catherynne M. Valente. As a bonus, it includes an except from George R.R. Martin's A Dance with Dragons, the next book of the Song of Ice and Fire series.
Visit Pat's blog for more information on the many cool things up for auction and to help out this eminently worthy cause.