InfoWorld's Galen Gruman, who snagged some demo time with Windows Phone 7, is calling the yet-unreleased platform "a failure." It gets pretty harsh:
Windows Phone 7 is a waste of time and money. It's a platform that no carrier, device maker, developer, or user should bother with. Microsoft should kill it before it ships and admit that it's out of the mobile game for good. It is supposed to ship around Christmas 2010, but anyone who gets one will prefer a lump of coal. I really mean that.
Main gripes were on the clunky card UI based on Zune and the older tech underpinning Phone 7. Prognosis is poor and Gruman pulls no punches, catch the full report at Windows Phone 7: Don't bother with this disaster.