I saw this in another thread, and think that its a great idea. I forget which, so I'm making a new thread. I searched, but all the old threads talking about this were in 2011, and I didn't want to be a necromancer. Though, if you like, you can delete and move this thread if it's in the wrong spot.
Anyways, I think that we should all email wikipedia and suggest to them to accept Bitcoins as a donation method. I sent them an email, and got this in reply "Thanks for your email and for your suggestion. We are aware of bitcoin, and we will continue to monitor it with interest. Thanks again for taking the time to email us."
I think that if enough of us were to send emails, it would give them the pressure needed to do so. Also, someone who knows whats what should also offer to help them implement such a system.
problemsdonating@wikimedia.org Send away! It takes less then 30 seconds, and could be a huge help.