US cities launch information for SQL 2005, Visual Studio 2005 and Biztalk 2006: http://www.microsoft.com/events/2005launchevents/default.mspx 

For the UK specific launch dates and venues etc please see the following:

http://www.microsoft.com/uk/windowsserversystem/launchtour/default.mspx

As of the 14th of October, 2 of the technical tracks are already full booked!