Ahhhh, you know how we live to go in for this idle speculation stuff. Someone has made a connection between the description of the design of the next Xbox as being concave, and the design of the xbox.com site header as also being concave. Eureka! Now that we've got two things that are concave, that's more than enough to go on to spin some rumours out of, eh? Of course, it's probably bunk, but how much you wanna bet Microsoft's gonna wish they had been that clever?
UPDATE: Get your Xbox 360 pics here