X-link to the DRM-free thread for the new Humble Bundle, which is an excellent offering, IMHO:
Humble Book Bundle Women of Science Fiction & Fantasy presented by Open Road Media contains their reprints of quality backlist fiction by notable authors including Robin McKinley, Octavia E. Butler, Elizabeth Hand, Pamela Sargent, Katherine Kurtz, and more.
I actually have a decent chunk of this from recent ORM sales, but still consider it well worth it even if I already own maybe a third of it in one form or other. Anyway, I approve of their efforts in bringing backlist books back into affordable e-print and am willing to throw some more money their way if I'm getting a good deal in the bargain.