i have a strange feeling we'll see it on the hd2, kinda like meego, it'll be a community job if the big companies don't do it.

Balmer is too shrewd, he will never allow this on htc hd2.
Companies like Adobe also have retracted their own decision of not bringing Flash 10.1 to hd2.

On the other side see google its upgrading to Eclair 2.1 even on older devices.

As far as I know you need 3 special Hardwarebuttons at the Device for the new Windows Mobile Version. One or more Buttons are missing at the HTC HD2. So the Update is not possible.

htc hd 2 has 5 face buttons, i'm almost sure some people over at xda developers will be able be able to map the buttons.

When it comes to hardware support, I think that Nokia could take a couple pages from nVidia's playbook. That is, for the proprietary parts, Nokia could provide just a binary blob that makes the hardware work.

I am in my sixth year of using Linux on my desktop despite naysayers who say that Linux is not ready for the desktop. I believe that the community can take the n900 and make it into something great.

lookie here, htc hd 2 with windows mobile 7.
http://htcpedia.com/forum/showthread.php?t=2381

hopefully this means that if nokia doesn't push out an official upgrade, the community will comeout with one.