Anybody starting out with Commerce Server 2007 have been in the same situation, lacking ressources for training, as these have been virtually non-existant. This obviously leaves the learning curve rather steep, as you are pretty much on your own.
I started out with a clean install on a Virtual PC, a copy of the Starter Site and a lot of time experimenting and trying things out. Thats a pretty good way of learning, but you could really save a lot of time if you had a few training ressources to get you started, and to explain the basics.
Well this is your lucky day, because Max Akbar has just announced on his blog, that there is upcoming training material, that is in the final testing phase, and that - within two weeks - will be published to MSLearing .
Furthermore there seems to be plans for a book, so this is very exciting. If you'r working with, or have an interest in, Commerce Server - be sure to subscribe to Max's blog feed .