Bond Aviation based in Atlanta. I looked at two, the 737NG course is based at Delta Airlines Contract Services. The course qualifies not only on the NG (600/600/800/BBJ) but also the EFIS models (300/400/500) so all in all its a pretty good deal at a cost of $9,500! FAA remember fellow wannabees.
Another PPRuNer, Tropaco put me onto them both. I hope he has found something since he first PM'd me
There are a number of good deals about but Bond seemed to be the best around (pricewise) and in terms of approach.
US Air offer a deal on the A320 for approx. $11,500
This is an article I found useful:
http://www.avweb.com/news/avtraining/182365-1.html