This is something I've been sitting on for awhile, and have just now gotten around to acting on: towards the end of last year, difficulties arose in the security situation of Ayaan Hirsi Ali, who wrote the script for the short movie Submission that got Theo van Gogh killed, and who also wrote Infidel (excellent book) and The Caged Virgin: An Emancipation Proclamation for Women and Islam (which I haven't read). She was at one time not only a Dutch citizen but a member of the Dutch parliament, so the Dutch government helped her go into hiding in the Netherlands, and then flee the country all together, though she was provided with security in the United States. Then, in October of last year, the Dutch government withdrew its support for her security.
In response, Sam Harris organized the Ayaan Hirsi Ali Security Trust and later the Foundation for Freedom of Expression, to protect Ali in the US. I think I initially found out about it through an e-mail, in which he stated that if everyone who got the e-mail were to sign up for a $10 monthly donation, the problem would be solved (though also that realistically, he did not expect such wide grass-roots support, and was hoping for larger donations as well). Full information can be found at the last link. I just got around to making a small donation of my own, and I encourage anyone reading this who can afford it to do so as well.