It would nice if Nikon produced a master unit that did only that - communicate with SB800s and SB600s, mounted in a camera's hot shoe. It could even be relatively small. Could also have the same focusing assist that the SC29 cord has. Kind of a cordless SC29.
What about 3rd party wireless units? I have never looked into those.
What I tend to do is have on SB800 off camera on an SC29, then two or three others wireless. This works pretty well, though the cord is often a problem. I have pulled over light stands more than once.