http://dreamlandmattress.wordpress.com/

I had asked about a bed type in a blog a long while back, and just today got a reply from Bruce, The Mattress Man.  Has his own store, has 30 yrs. experience, and could be another good source of input here.  I will write to him and see if he wants to add from his knowledge base.
(PS) From just looking at the blog part of his site, looked like he knows what is in his mattresses and has good prices.
Kait