If you are among those that don't have an Xbox 360 yet, there is a tool available at http://untitlednet.com that will check the inventory at Best Buy, Circuit City and FutureShop.  It's cool because it's cool but it's *especially* cool because it was created using version 2.0 of the .NET Framework.  Craig McMurtry has built a version that searches across the entire US and demonstrates the capabilities of WinFX.  Nice.