Craig has a great hands-on preview of the M400 which many of us have been eyeing. He ran into some issues with the Vista Dec CTP but plans on trying the new Feb CTP. I'm only slightly jealous.
In related news, Alex also tells me that the high-resolution screen option for the M400 has mysteriously disappeared from Toshiba's site and as a result his purchase is on hold.
This is precisely the reason I never really thought too seriously about the Thinkpad X41. Once I experienced 1400x1050 on the Tablet, I couldn't go back to 1024x768, especially on a 12.1" screen.