I've been stalking the Joshin Denki - PW update page daily, and it's interesting to note that tokyo branches have been totally out of stock for several days, while more stock seems to be piling up in osaka! Strange phenomenon.. maybe it's because Joshin has only a few outlets in tokyo, and has 4 times as many stores in the osaka area...
Or that tokyo e-readership demand is higher..
Joshin Denki PW update page here!