http://www.metnews.com/sos.cgi?0313//10-55946
Major points --
P2P sites are not generally protected by the DMCA's Safe Harbor & in this case the owner of the P2P sites was liable for contributory copyright infringement under a theory of inducement...
Its a long read but very interesting (at least for lawyers)...
IMHO Some of the discussion about Safe Harbor might be applicable to tubesites as well...