For well over a decade the software companies of Northern California and the media companies of Southern California have been on a collision course. That collision has finally happened around the MP3 music file format, and been given legal form in the case over the future of Napster.com in San Francisco. No one is surprised by the fact of struggle. After all, the vast financial assets of the media companies have been put in jeopardy by the Naspter peer-to-peer sharing system.