LOVE these...
Have you considered getting a photoshop artist to actually hand color the b/w photos with the researched colors... before and after pics?
I've done a lot of that, and sometimes the affects can be really cool... Here's (bad example, since I didn't spend very much time on this one) one for a soccer club I follow... Arsenal. I'm planning on doing some baseball ones (when I get the time). When's the book coming out?
