Thanks, Bob, for the comments on the P-2000 and the 5D. In the brief research I have been able to do, there was an issue highlighted about the P-2000 not being able to handle jpegs larger than 8.9mp (which I found odd) and that this would be a problem on next gen cameras.
David, the Jobo Giga Vu Pro is a fascinating device as well that I will add to the list of viable options.
Will also consider devices that don't have big colour LCD's. The appeal of the Nexto CF was that it was firstly blindingly fast which means that (1) the backup happens real quick, (2) that it wasn't chewing the battery up forever in the process, and (3) it was real, real, simple.