I guess I should read my manuals more carefully. After buying the SU-800 to use with my (2) sb-800s, I was asked why I bought it if the D200 can do the same thing.
I've searched here and a few other forums and it appears the only real advantage of the Su-800 is that it communicates in IR and not flash. But I also found that Nikon sells an IR shield, the Nikon SG-3IR, that covers the built in flash.
So I guess my question is, what is the big deal with the Su-800 over the D200 and D80 commander modes?