Continuing the never-ending history of Windows Mobile 6 upgrades, the PPC-6700/XV6700 series of devices will soon get an upgrade according to Engadget Mobile. The site also has loads of images available…for me, it looks like the device pictured definitely runs Windows Mobile 6:
http://www.engadget.com/2007/08/31/cooked-winmo-6-rom-verified-for-ppc-6700-xv6700/