If you have time to, watch this 22 minute walk-through of the Windows Phone 7.
In my opinion it looks really good, a lot better than the previous windows phones. It is a lot more like an iPhone, but with stolen design from the Zune (why is it not called the Zune Phone?). This could be a Microsoft win.
So, what do you think? Is it a gamechanger? Will this be your next phone, instead of an Android or iPhone?