There are web casts on the key new features in SQL Server 2008 coming, here the schedule is below and there is also an upcoming chat;
Chat: http://www.microsoft.com/technet/community/chats/default.mspx
SQL Server 2008 Livemeeting Schedule
Analysis Services - Dimension Design
06/12/07
11:00 am PDT
Change Data Capture
06/13/07
Star Join Query Optimizations
06/19/07
Table Valued Parameters
06/22/07
Declarative Management Framework
06/26/07
MERGESQL Statement
06/29/07