Hüseyin Tüfekçilerli started a project on CodePlex to bring the new Windows 7 API extensions to .NET. There are yet some features left to implement but it’s a good start. I think it is however unclear if the new features will be integrated into Vista Bridge, too, or not – I felt like starting a thread here.

http://www.codeplex.com/Windows7TaskbarExt

UPDATE: Microsoft released an own implementation for this (including Vista Bridge):

http://code.msdn.microsoft.com/Windows7Taskbar

UPDATE2: There is a new project from Microsoft providing Multi Touch support:

http://code.msdn.microsoft.com/WindowsTouch

UPDATE3: There is a new project available from Microsoft called Windows API Code Pack:

http://code.msdn.microsoft.com/WindowsAPICodePack