As it's been said before, I think the technical parts are simpler to take care of. (note that I did not say easy, nor cheap, nor quick).

But what will be the unifying force and the draw for this site past maemo?

ITT era: NIT users looking for a forum. Nokia churns out the hardware and they fund core development of subsequent OS, frameworks and other software components to draw developers, potential integrators and whatnot.

maemo era: similar, except the users part is disproportionately more than the devs. The opposition platforms have grown and matured as well, sucking away some of our devs and users to migrate to them. (Note that the opposite migration happens in much much less quantity).

meego era:
- no new hardware on maemo
- no corp funded software development on maemo
- no new users to draw when the 2 points above stops (well this could be seen as a plus for some, heh).