So MS had their huge launch for the 360, and got a lot of buzz - I've seen the systems at local stores, and yes - the graphics are very cool. However, the severely limited number of systems they've got available is a real problem. The initial batch sold out immediately, and now there's a rump marketing campaign for a system that you can't actually buy. And mind you, there are 26 shopping days left before Christmas.
I was thinking that the overheating problem with the power supplies was a sign that they rushed the release to hit the Christmas window - and this shortage is another sign of the same thing. With so few units available, it looks to me like they would have done better to just hold off until they had units available in quantity - and without that over-heating problem.