I'm part of an open source project developing a secure, decentralized storage system. We just started accepting BitCoin donations along with PayPal and Flattr donations. I hope to add acceptance e-gold donations as well.
http://tahoe-lafs.orgThe donations are mostly used to defray the costs of running servers and to send special "thank you gifts" when people contribute to our project, such as when they find a security hole:
http://tahoe-lafs.org/hacktahoelafsWe actually have a long-term plan to integrate digital cash payments directly into the storage protocol. :-) Tahoe-LAFS is a grandson of a p2p file-sharing application named "Mojo Nation". (BitTorrent is another grandson of Mojo Nation, so Tahoe-LAFS and BitTorrent are first cousins.) Mojo Nation had blinded Chaumian ecash baked into the protocols. It was a great idea! :-) But it tried to do too many different things and it never worked right. :-( Nowadays Tahoe-LAFS tried to do fewer things: just the secure distributed storage part. It turns out even just that part takes a lot of careful engineering to make it work. But it does work, so now we have one solid component that we can build on. Hopefully in the future we can marry it to another solid component that does digital payments. :-)
Regards,
Zooko Wilcox-O'Hearn
community organizer, Tahoe-LAFS project