We've sued individuals twice for copyright infringement over the years - both times we settled out-of-court for damages and 'loss of income'. They weren't based on P2P, but webmasters who had the gall to use our pics on the front pages of their paysites.
One of the guys (in Great Britain) was so freaked out by a well-worded legal correspondence we sent him - wound up phoning us overseas at 4am (he'd forgotten the time zone difference) to try and settle for damages.
But I hafta' say the industry needs more legal precedents for successful copyright infringement cases. Check out the case between Suze Randall and Max Sheridan (Reactor, Inc.):
http://www.apic-worldwide.com/news/051600.htm