Going back to topic, to me this new appointment only means that while Meego does exist at Nokia as an OS, there has to be someone leading the project.

On the other hand, the Meego for N900 official support is just a consequence of the cancellation of the original Qwerty N9-00 Developer device.

The Meego product will be a stylish touchscreen, qwertyless, they need a Qwerty device to encourage developers to test and extend the platform and thus, N900 seems like a good alternative if you have no other devices in the pipeline.

My two cents.