Upload & Sell: Off
I went to a local retailer and tried to fish some info but all I got was a coy smile, which is probably an answer in itself. All he said was that next month is Canon month, whatever that means. If the mkIV is really being announce this month, I'm guessing that's when they start being available.
Anyway, I look forward to a whole bunch of new b*tching threads about it when the camera finally arrives in the hands of our resident pixel pervs.