Atomiclearning.com has a FREE tutorial series on Windows® Movie Maker 2. I found it by doing a Google Search on "Movie Marker Tutorial". There are thousands of how to use Movie Marker videos on YouTube.
PC Media Net does a good job with his presentation.
If you have any specific questions on using the program, let me know.
why use a website when you have me? :-)
1) from my own experience using MM, it crashes all the time. However, it is the simplest product to use. Also, from what I hear, Vista has less hiccups.
2) here's a youtube clip with instructions for using movie maker.