I'm sure they will be on ebay -- for $300
I'd wager that a non-insignificant % of the people scrambling to order want to get their hands on one to flip it on eBay. Watch what happens when they start shipping.
Regardless, I don't see what the urgency is. If there's something you need to develop on an embedded ARM SoC, there are plenty of other more available (and less publicized) options.
Edit: http://www.ebay.co.uk/itm/Raspberry-Pi-Model-B-Ethernet-700M... ; $999 on buy it now ...
Edit 2: There's also this, http://www.ebay.co.uk/itm/Raspberry-Pi-Model-B-Ethernet-700M..., which is interesting - must be against ebay policy to sell things you don't own?