Next Generation is reporting an estimate of 400,000 units sold for the Xbox 360 in its first week on the retail shelves. Microsoft is planning on having more stock available as of this weekend. From the article: "It seems even the biggest retailers are in the dark. Speaking to USA Today, Circuit City's Jim Babb said, 'We knew demand would outstrip supply for some time. I have been told we'll get additional supplies, so I can only advise customers keep checking back with stores and on the website.' Microsoft is gearing up for its European launch this weekend, but many believe the shortages could be even worse over there. Retail supplies are said to be tiny, and many customers who have pre-ordered have been told that they may not receive their machines this side of the New Year."