Grab the Team Suite & Team Foundation Server July CTP releases from here:
Visual Studio 2005
Visual Studio 2005 Community Technology Preview
Visual Studio 2005 CTP July 2005
Visual Studio 2005 Team Foundation Server CTP – July 2005 (English)
Visual Studio 2005 Team Suite CTP – July 2005 (English)
Grab this release of SQL Server 2005 for use with the July CTP release of Team Foundation Server:
SQL Server 2005
SQL Server 2005 Community Technology Preview
SQL Server 2005 CTP June 2005
SQL Server 2005 CTP – June 2005 Developer Edition (English)
What's new in this release? For Team Foundation, see this post.
Will other editions of SQL Server 2005 June CTP work? In theory, yes.