Doc Searle had a link to the Chilling Effects Clearinghouse, an excellent site dealing with many issues related to the chilling effects that laws and practices have on freedom of Speech. I found their treatment of issues surrounding fan fiction to be particularly interesting, but they are also trying to document Cease and Desist letters which are received by ISP and others for distributing content which in some way offends someone who thinks they have some claim to being offended. Good stuff.