Windows API CodePack
You may not be aware of this, but Windows 7 adds some new functionality that is accessible to .NET Developers through direct API calls. (I could have sworn that Microsoft promised to make all API functionality callable via managed code, years ago. Not there yet...)
In any case, you can use the Windows API CodePack to access many of the new features from managed code. This pack includes examples in both VB and C#. The pack also includes wrappers for older APIs that you will certainly find useful. Check out this library full of useful information!