I, too, really like Fat Burning for Dummies. I did it this morning, actually!
I also really enjoy Donna Richardson's tapes, especially the 4-day rotation... Back to Basics is good, as well. She's just a whole lot of fun, and while I get a little caught up in the steps sometimes, overall it's not too confusing, and she does cue well.
Oh, and my favorite Richard Simmons tape is Sweatin' to the Oldies 2.