May I promote the nlnet.net foundation to you - I talked to them and they do now accept Bitcoin donations
I'm not in any way affiliated with them. Here's what they fund(ed) in their own words:"NLnet has contributed funding to many important and very visible projects such as NLnet Labs, Jitsi, the SSL Observatory, NoScript, Tor, GPLv3, Serval project, Calligra and webODF as well as many other less known projects that operate more in the background. "
I'm especially a fan of Jitsi as an open-source Skype alternative, which they support.
So take a minute to have a look on their site. If you like them as well, here's the link to their donation site:
http://nlnet.nl/donating/donate.cgi?for=foundation