This is so obvious it was clearly meant to be seen. But for those wondering what the Origami project actually is. Go to http://www.origamiproject.com/2/ then view the source in your browser. Right at the top is a helpful comment (Look away now if you don't want to spoil the surprise) and it says:
<!--
Origami Project: the Mobile PC running Windows XP
-->
Well it was hardly a surprise. What is intriguing is if XP will have extensions to support the cool stuff that we have in Windows Mobile like the camera/phone support that is not currently available in XP. I guess we have to wait another week for the full details...
Ian