Velocity Vector
Piper Jaffray has some predictions for the XBox 360 lauch:
http://www.gamesindustry.biz/content_page.php?aid=10627
The estimate is that about 1.6 million XBox 360s will be shipped by the end of the year, likely leading to intense shortages in much of the world. Around 25 XBox 360 games are expected to be available by the end of the year.