Microsoft has released SQL Server 2008 Express Edition Service Pack 2 CTP
Microsoft SQL Server 2008 Express Service Pack 2 (SP2) CTP is now available. Microsoft SQL Server 2008 Express is a powerful and reliable data management system that delivers a rich set of features, data protection, and performance for embedded application clients, light Web applications, and local data stores. Designed for easy deployment and rapid prototyping, SQL Server 2008 Express is available at no cost, and you are free to redistribute it with applications. It is designed to integrate seamlessly with your other server infrastructure investments.SQL Server 2008 Express Edition Service Pack 2 CTP
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.