Soma announced today that WinFX is being renamed to .NET Framework 3.0. Jason has more detailed info though.

WinFX will become .NET 3.0 while still running on the CLR 2.0. C# 3.0 will not be part of this release, but rather remain part of the 'Orcas'-release (scheduled for sometime 2007). I guess they'll have to rename it to C# 4.0.

Updated 6/13/2006: There is also a .NET 3.0 website at http://www.netfx3.com/