IF I recall correctly, there were 12 semi-finalists and 3 finalists. Dawnforge, Morningstar, and Eberron were (obviously) all semi-finalists; Eberron and two others were finalists. I think the semi-finalists had to produce a small (30 pages?) "bible"; the finalists had to produce the big 125-page one.
I'd be very curious to see what the other two finalists, and the missing 7 semi-finalists, were like (I've heard parts of the other finalists were merged into Eberron). Clearly the finalists were under a NDA, but the semi-finalists don't seem to be (or something was worked out with Dawnforge and Morningstar).