Perhaps sensing that StreamCast Networks is on the way out, Altnet is claiming a piece of its carcass by suing StreamCast for patent infringement.

Altnet partner kazaa and StreamCast have had an acrimonious relationship since Kazaa kicked StreamCast off its Fast Track network a few years ago.

You need a scorecard today to track who's suing who with RIAA, Streamcast, Sharman , and now Altnet all lawsuit happy.

Altnet recently launched the Global File Registry. Altnet claims it acquired the patents in 1999, announced it would defend the patents in June 2003, sued RIAA and others in September 2004, and sent a notice to several P2P developers in January 2005. Since then, the only public action has been a settlement with Loudeye, which exited the P2P monitoring business.