In his keynote at BUILD, Jason Zander announced the availability of:
- .NET Framework 4.5 Developer Preview
- Microsoft® Visual Studio® 11 Developer Preview
- Microsoft® Team Server Preview
If you are an MSDN subscriber, you can download the preview immediately via this link. For everyone else, Visual Studio 11 and Team Foundation Server 11 will be generally available starting at 10:00 AM PDT on Friday.
For more details, check out the announcement on the Visual Studio Blog:
http://blogs.msdn.com/b/visualstudio/archive/2011/09/14/visual-studio-11-developer-preview-announced.aspx