I just read the latest review on win 7 mobile and its not as good as the latest offerings from android 2.2 and i4OS.
Kinda dissapointed in that there's quite alot thats missing from win7 mob.
- No system-wide file manager
- No videocalling
- No Bluetooth file transfers
- No USB mass storage mode
- No memory card support
- No multitasking
- No copy paste
- No music player equalisers
- No Flash or Silverlight support in the web browser
- No DivX/XviD video support
Here's the full review
http://www.gsmarena.com/windows_phone_7-review-521.php