I get the Musicians Friend catalog, and a new one arrived. I was flipping though, and there was a review of the DBX Drive Rack PA.
http://www.musiciansfriend.com/srs7/g=live/content/doc_id=89558Reading the review, and then reading the user manual, what it does makes sense.
Just to see what similar functionality would cost, the closest I could find would be a Behringer Ultra Drive PRO DCX2496, and a Behringer Ultra Curve Pro DEQ1496. The two total ends up being $550.
The DBX Drive Rack PA is $500.
I have not heard the DBX in person, so I cannot say how it sounds, but after reading the review, it sounds promising.
Stv