My most popular classes on Kelby Training are on these cameras. Here are the links:
Canon 5D and Canon 5D Mark II
and
Canon 40D and Canon 50D
And if you are new to digital SLR photography, here's a link to my class on Digital SLR Basics.
Below are a few slides from the presentations.
I hope you enjoy my classes.
Explore the light,
Rick
P.S. My iPad app, Rick Sammon's 24/7 Photo Buffet, also has tons of tips for digital SLR shooters.