Microsoft has released Microsoft SQL Server 2008 CTP, February 2008B
>> SQL Server 2008 FEB CTP
Download the latest SQL Server 2008 Community Technology Preview (CTP) and try out the latest features of SQL Server 2008! The SQL Server development team uses your CTP feedback to help refine and enhance product features. Download it today and send your feedback.
>> SQL Server 2008 FEB CTP