Microsoft .NET Framework 3.5 SP1 Beta

[Avi]

Microsoft .NET Framework 3.5 service pack 1 is a cumulative update that contains many new features building incrementally upon .NET Framework 2.0, 3.0, 3.5, and includes .NET Framework 2.0 service pack 2 and .NET Framework 3.0 service pack 2 cumulative updates.

View Readme (there are quite a few Known Issues)

Download: Online Installer (2.8MB) or Full Redistributable Package (230.0MB)

[Sam Symons Veteran]

Sweet =)