Download Microsoft SQL Server 2008 SP1 CTP

The CTP version of SQL Server 2008 Service Pack 1 can be used to upgrade any SQL Server 2008 edition. These packages have been made available for general testing purposes only. Do not deploy the CTP software in production. Peer-to-peer support is available in the SQL Server 2008 forums.

Download: SQL Server 2008 Express SP1 CTP | Microsoft SQL Server 2008 SP1 CTP