It's sold out at Costco too!
http://www.costco.com/Browse/Product.aspx?Prodid=11104670&search=kinect&Mo=9&cm_re=1_en-_-Top_Left_Nav-_-Top_search&lang=en-US&Nr=P_CatalogName:BC&Sp=S&N=5000043&whse=BC&Dx=mode matchallpartial&Ntk=Text_Search&Dr=P_CatalogName:BC&Ne=4000000&D=kinect&Ntt=kinect&No=7&Ntx=mode matchallpartial&Nty=1&topnav=&s=1
I wonder if there was a hold up with the manufacturing? The pre-order numbers It must not be as easy to ramp up production on a new piece of hardware, unlike burning extra DVD's (like Halo:Reach) to sell. And they don't want another hardware fail blunder.
If it has anything like the legs of Wii Fit, then it should to very well over the long run. It just depends on how well it works, and how much fun it is.
I would like to be able to say, "Xbox Pause" when playing Netflix.