Jim, I was looking into the possibility of a wood framed basement/foundation a few years ago. These type of foundations are known as PWF foundations (Permanent wood foundations) they use treated lumber and treated plywood and many are built on rubble trench footings. If done properly these type of foundations perform very well and some advantages over concrete. Take a look at some of these sites.
pwfs.com 810 955-4305 | The Official Web Site for the Permanent Wood Foundation System.
The Official Web Site For Wood Foundations
Biewer Lumber Permanent Wood Foundations