Some links to endangered expression in cyberspace:

• criticism of corporations: Dow Chemical, not liking the aforelinked spoof site, issued a SLAPP threat under the DMCA and internet service provider Verio terminated a downstream provider's contract.
  - (my mirror site)
• criticism of corporations: A case study in internet censorship - Biwater PLC
  - (my mirror site)
• anonymous speech, democracy, politics, election "advertising" - 1997 Anonymous Political Statement
• open government, corruption unmasked, accountability: Fraud in the Alberta WCB
• boycotts, aboriginal land claims, human rights: Friends of the Lubicon
• politically incorrect or unpopular opinions:
  Freedom Site (a little in-your-face and biased imo, has been called "hate speech")
  Committee for Open Debate On the Holocaust (technically "revisionist" but not biased imo. Some of David Irving's material there.)
  
• documentation on proprietary encryption schemes: Microsoft's Digital Rights Management Scheme - Technical Details

links that didn't make it above:

• politically incorrect humour, commercial: Offensive T-Shirts
  (Click-thru ads are dying, thankfully. I don't think commercial advertising is a human right like freedom of expression. This ad has no click-thru revenue, but i get money if you buy a shirt or sign up as an affiliate and sell shirts.)