These days literally hundreds of companies are promising to deliver the next big Massively Multiplayer Online tour de force. But it may serve us well to remember that even the simplest of multiplayer games usually ends in more whimper than bang. In fact, the commercial success rate for multiplayer games and game communities is downright dismal. As a person deeply involved with several epic failures (as well as a hit or two), I will present design, technical, and business techniques you can emulate to ensure that your multiplayer game becomes a party nobody shows up for.
Slides and MP3 here: http://www.casualconnect.org/content/Seattle/2008/foxsea08.html