Winextra has a bunch of videos of different aspects in Windows Phone 7. Gotta say it looks pretty good, I'd definitely want to play with that (hint hint Microsoft). The one thing I'm still worried about with this new Phone OS is that it looks really good in demos, and like it came out of a designers dream, but will that work In The Real World. Case in point is the header in mail of the user, check out the email from Frank Wu in the first video starting at 0.27 in (link). That looks awesome, but do I really want half my email screen used up with a useless avatar? While it'd be great the first time, would it start to drive you crazy after scrolling half a page down for each email? Or would it end up with the user not adding in images for contacts to avoid this? Some of these things we won't be able to really see until these devices show up in the world.