Since there is quite the backlash from so-called "power users" against Windows Phone 7 (it is quite the a change), learning to hack and break down the new walled garden of Microsoft will be the new rage we predict.
And while the Zune HD and Windows Phone 7 only share some similar code/structure, learning to port games,load hacks and implement tricks on one may help with the other.
Just days afters basically jail braking the Zune HD, it has past a rite of passage: playing Doom.
Sure, it's nothing amazing and it's sort of the least you expect after this long a time, but hey, at least we now know the question: But can it play Doom? Here's to doing the same on WP7.