SQL Server 2005 Express Edition with Advanced Services

Microsoft has just released:

SQL Server 2005 Express Edition with Advanced Services A new, free, easy-to use version of SQL Server Express that "includes more features and makes it easier than ever to start developing powerful data-driven applications for Web or local desktop development".

Readme Files for SQL Server 2005 SP1 and SQL Server 2005 SP1 Express Editions and Tools
Before you install SQL Server 2005 Service Pack 1 (SP1) or SQL Server 2005 SP1 Express editions and tools, review the readme for information about installing SP1 and to learn about common issues that can impact your installation experience or use of the product.