Windows Movie Maker
Download
http://www.microsoft.com/windowsxp/downloads/updates/moviemaker2.mspx
Sample Videos
http://www.microsoft.com/windowsxp/using/moviemaker/videos/samples.mspx
Community Site
http://www.microsoft.com/windowsxp/expertzone/communities/movie.mspx
Tutorials
Mighty Coach - Good tips for creating movies, especially Kung-Foo movies!
Atomic Learning - Lots of video tutorials.
Microsoft.com - Getting Started with Movie Maker.
Microsoft.com - Working with video clips.
Microsoft.com - Creating Home Movies.