Microsoft's .NET Framework 3.0 Released

Microsoft officially released the .NET Framework 3.0!
Microsoft .NET Framework 3.0 is the new managed code programming model for Windows.
(Previous versions were .NET 2.0 & .NET 1.1)

Microsoft .NET Framework 3.0 combines the power of the .NET Framework version 2.0 with new technologies for building applications that have visually compelling user experiences, seamless communication across technology boundaries, and the ability to support a wide range of business processes. These new technologies are:
Windows Presentation Foundation,
Windows Communication Foundation,
Windows Workflow Foundation &
Windows CardSpace.

.NET 3.0= .NET 2.0 + WFX.

WinFX is the set of APIs that you will use to write Windows applications in OS: VISTA.
Windows programmers today use Win32.
WinFX is the next generation of APIs for Windows. The "Win" in WinFX stands for Windows and the "FX" stands for .NET Framework Extension.

Next version is .NET 3.5 comprised of:
-> Deep integration of Language Integrated Query (LINQ) and Data awareness.
-> New web protocol support for building WCF services including AJAX, JSON, REST, POX, RSS, ATOM.
-> C# 3.0, VB.NET 9.0, Atlas are also included.