Aarrggg..... been waiting on the 600II for a while now, I have it preordered, I think I'm first or second in line at the shop.
People talk about the Olympics and Canon missing the date. However, the big name sports shooters seem to already be using the 1DX as it has been spotted at all sorts of recent events (golf, tennis, F1, etc). I would guess that Canon is actively producing 1DX's and 500 and 600s right now but that the initial stock is just going out to all the pro sports agencies. I don't think there will be any shortage of 1DXs in the hands of the pros at the olympics. Most of them shoot 400 2.8s over the 500 and 600 so that won't be an issue either.
Us mere mortals will continue to wait with our 10s of thousands of dollars burning holes in our pockets