The second in Ars Technica's series of pieces on the Xbox 360's hardware specs focuses on the "Xenon" CPU. There's also a separate short article quoting Allard's "around $300" remark to TheStreet.com, as well as characterizing the original Xbox as being made from "off-the-shelf parts" due to time constraints on the machine's design-- mirroring IBM's similar procedure in designing the original PC.