Why should he return donations? If people want to pay him for his TIME, there's nothing wrong with that. It's akin to someone paying me for my time to fix their car, or to mod their car. I'm not taking credit for engineering the car, I'm just providing my time and expertise. I think if he wants to provide a service for free, and well wishers want to help support him completely voluntarily, there's nothing wrong with that.
netbuzz writes "Lawyers for the Swiss bank that got the plug pulled on Wikileaks.org have dragged a Stanford grad student/human rights activist into the case because he moderated a discussion group about Wikileaks on Facebook. He has no relation to Wikileaks or the case, other than that he helped authenticate documents — completely unrelated to the bank matter — that were posted on Wikileaks. The guy and his lawyer have done a nice job of making lemonade out of this lemon, though."