The mount will work for pretty much all SLRS... Some of the newer ones are shorter, so if you want the tilts to remain centered, then you will need to use a battery grip. Or for $315, I found a place that that sells a universal mounting block for all Canon and Nikon cameras without batter grip. To use the camera with Nikon, one would also need a Nikon ended bellows or find some kind of adapter.
The camera can also be converted to medium format (ultima 23) or 4"x5" (ultima 45) by use of a format changing kit. I have located a demo 4x5 kit for $475.
This kit includes a base rail extension, 4x5 carrier frame, 4x5 back, and 4x5 bellows.