Wow! My cell phone has 128meg of ram. I guess it doesn't have 4 processors. It's hard to imagine that something so cool as a Cray−XMP only has a fraction of the processing power of first gen XBox (a 700mhz Pentium).
PS: The image above was borrowed (stolen) without permission from a talk by Herb Sutter. You can download the presentation slides for his talk from his website.