Hi all. I've been lurking, watching this thread for a a while. In fact, it was thanks to mcnoiserdc's post that I became aware of the RS 220 having become available -- thanks mcnoiserdc!
I just received my RS 220 (ordered from B&H Photo). Charging right now, will have to wait till tomorrow to try it. I just wanted to say, I'm not sure that regular AAA batteries will work with it. I had the RS 170/180 at one point, and that documentation did say that regular AAA was OK, but the RS 220 documentation does not. So, I just wanted to say that it might be good to be careful with using other batteries. I'd love to be proved wrong (would like to be able use regular AAAs myself) so if someone can point to information about regular AAAs definitely being OK, that would be great!