If you visit "The Area"
http://area.autodesk.com/ you can now go through the entire Maya Composite 101 tutorial I wrote. Part three is now posted and you have access to parts 1 and 2. As Phil Hoppes had posted some people have had issues with the zipped files. Follow his instructions in the earlier post and you should be ready to go.
Let me know what you think of the tutorial and there is more to come!!
Ken LaRue
Autodesk Application Engineer
Maya Composite / Toxik / Flame / Combustion
Training DVDs:
http://www.thestreetproductions.com