[Arterion]

The underlying OS for WP7 is the same as WM6. I have high hopes that the folks over at XDA will come up with some equivalent to rooting or jailbreaking WP7, and that some type of comparability layer to run existing software will be created.

While I think Microsoft is playing like Apple on this one, and trying to lock down way too much about the phone -- the exact opposite approach that Android and WM6 have been successful doing -- I also think it's only a matter of time before their lockdowns are circumvented.

I mean, you have to "unlock" your TP2 to flash a ROM on it. Which is pretty much essential. God forbid you have to use your carrier's stock ROM; most of them totally suck. I don't see how it can be too different to unlock a WP7 phone, the load up a custom ROM that lets you do what you want.