Looks like you will need a radio transmitter enabled camera and a 590ex. I can live with that. I just hope the off camera 590ex slave can control my legacy 580ex IIs as a master also so I won't have to buy 3 of them.
I think this is a good deal. I find the lack of a pop-up flash (used only as a commander) on the 5D2 is very limiting both for weight and for freeing up another off camera flash unit.