Groklaw.net is reporting that Acacia Technologies has been filing litigation against websites for patent infringement on patents they received for a system for distributing video and audio over the Internet. I used pat2pdf to download the relevant patents:
The EFF have placed this patent on their list of ten most wanted patents for their patent busting effort. Ultimately, they will research and file complaints to the PTO to have these egregiously abusive patents revoked.
It seems to me that there is obvious prior art, most notably the the Princeton Engine, which I heard about during my brief time at Princeton in 1989-1991.