The date is confirmed - we'll see the Community Tech Preview of Exchange SP2 next week :) Wooohooo
Check out Harold Wong's Blog Site : Exchange 2003 SP2 Community Technology Preview available for Download for more details including caveats related to the release. In summary though, it's a good thang!

Lots more handy info at http://www.microsoft.com/exchange/downloads/2003/sp2/overview.mspx too