The first public CTP of Katmai (soon will be officaialy called SQL Server 2008) will be available for download from http://connect.microsoft.com/sqlserver. Download links will be live on Monday (June 4th 2007) morning at 8:30am EST (18:00 in the UK). Please see attached documents highlights of the June CTP.
I'll focus on the SSAS (this is my territory) and promise to bring you more highlights (especially after Tech Ready 5 in July).
Cheers,
Itay Braun