There are some real good threads here on the forums that I've started using to play around a bit, but I'd be interested in a class as well.
This thread as awesome
http://www.ft86club.com/forums/showthread.php?t=62515
There is also this book I'm starting to page my way through
[ame="http://www.amazon.com/Modify-Management-Systems-Motorbooks-Workshop/dp/0760315825"]How to Tune and Modify Engine Management Systems (Motorbooks Workshop): Jeff Hartman: 9780760315828: Amazon.com: Books[/ame]