Blog of Henry Jia (贾宏宇)

Microsoft Announces 2006 Target Date for Broad Availability Of Windows "Longhorn" Client Operating System
Microsoft Announces 2006 Target Date for Broad Availability Of Windows "Longhorn" Client Operating System.

WinFS will be released after 'longhor'. The beta of WinFS will be released in the period of longhorn's release. 'Avalon' (the new presentation subsystem) and 'Indigo' (the new communication subsystem) will be also available on Win XP and 2003 in 2006.

See also: some of my experience on longhorn.