http://www.eweek.com/article2/0,4149,1405148,00.asp
“The MSN team is developing a release of the service that will be one of the many Microsoft products timed to be part of the Longhorn wave. The MSN 2006 service — currently code named "Longhorn Live" — will look and feel a lot more like Xbox Live than the current MSN generation, according to sources close to the company.”