Bart De Smet yesterday shared some Longhorn milestone dates, for anyone who's keeping track. RTM of the client on 24 May 2006, apparently. Personally I found it more interesting to hear that WinFS might be backported to Windows XP
Windows
A collection of 2 posts
XP SP2
Well, SP2 installed just fine on my XP Pro laptop (which is fairly crufty and full of beta software and assorted junk). No problems or unexpected side-effects to report as yet.