Here's an update on ATP stuff
I spoke with several people, including Mike at Sheppard Avaition, who has his own online study system for the ATP.
Apparently, the AFS 600 site has only a sampling of ATP questions, and the list on the site does not represent the current question pool. Some of the questions on the site have not appeared on any version of the REAL ATP test.
Also, about two years ago the FAA stoped putting the entire question pool on their websites, making study guide production more difficult.
I found that my most effective choice for study was to get a new CD from Gleim which has just been updated. With my current CFI status, the price came down to about $36 plus shipping.
Hope this helps someone else.