Ok, so maybe the video I posted last time was a bit lame (not an official 6.5 debut, but rather another leaked 6.5 beta hacked to work on a Touch HD)... but today at Mobile World Congress, MS dropped the real deal on us with a demo running atop some hot new HTC hardware (The Diamond 2 and Touch Pro 2 were announced and put on display at the event as well- HTC has been busy).
I haven't had any first hand experience with the OS so I can't really share my thoughts with you yet... however, you can read more on it at WMExperts, and see a video captured at the event by the Endgadget crew.
Looking forward to this when it comes our way...