Here's an interesting one-off about Windows Mobile 6.5. Microsoft has mandated that all phones running the OS feature a physical "Start" button.
(We can see an example here in the new HTC Touch Pro.)
Using the Start button will not take you to the Home screen, like the Zune, but to that trademark honeycomb icon screen that's new to Windows Mobile 6.5. As much as we like touchscreens, mandating a hard button in the 6.5 spec seems like a smart decision from Microsoft—one that should keep widely varied phones running the OS doing so with some level of consistency. [Gizmodo Windows 6.5 Liveblog]