Some subjective thought:

1) Project Management
Seeing how Mer went to Mer2 went to Mer2-for-N900 to MeeGo and how every initiative was touted as the way to go I cant help but to feel that there was a significant lack of proper project management and focus.
It is one thing to look at alternatives and options and it is another how to manage focus and how/when efforts are communicated to the public.
I feel that the ball was really dropped here and it has indeed impacted me in such a way that I have lost faith and interest in seeing more posts on this (Diablo alternative OS) topic from the op.

2) Bridging community efforts with Nokia assistance/resources
One of the 'benefits' that I assumed would come from Nokia sponsoring your position was, I thought, an improved channel to Nokia for resource/assistance on the distro work you embarked on.
It might very well be that Nokia have met any such request but the perception (read: My perception) is that not enough contacts/requests were made especially in terms of when working out what direction the OS development should go in. The whole 'missing driver issue' is another example of something that went on way too long and should had triggered a decision sooner.

3) Effort
I don't doubt for a second that a LOT of effort was poured into this so kudos on that.

4) Results
I read in another thread that the past months had taught you a lot personally and professionally and while that is great it doesn't take away from the fact that nothing has come out of the efforts and the perception (read: mine) is that a lot of efforts were wasted/thrown away due to the lack in focus and committment.

As mentioned a number of times above I am simply stating how I perceive things from being a simple end-user following the forum.
I am convinced that there might be results and accomplishments that I simply don't see/know of.

The above is not meant to be harsh or negative but rather an honest summary.

Using your own list of responsibilities, I'd grade my perceived value on each of them as follows (1-5 where '1' is poor and '5' is great)

* Developing collaboration spaces for developers of Maemo variants
Grade: 3
I think you did get some people involved and enthusiastic. I am not quite sure on names or numbers of them but there were posts where people chimed in.

* Mentoring and engaging developers in order to move the Maemo platform and variants ahead
Grade: 2
I am convinced a lot went on behind the scenes but I can't judge things I don't know of - and, I feel as if the 'enthusiasm' has lessened each time the project has restarted. I fear that this will in the end discourage future participation by people.

* Communicating with stakeholders (Nokia, distributions implementing the Maemo platform, users and developers)
Grade: 2
Goes back to the project management topic above. I don't feel/see that this was managed well at all.

Secondary role is serving as a paid system developer for the maemo.org community:

* Developing fixes and features for the Maemo OS & variants either on his/her own based on the input of maemo.org community council
Grade: 1
I haven't see any deliverable in six months. I may be wrong on this one though so please correct me in that case.

* or through activating, mentoring for and collaborating with community developer(s) in order to get it completed in collaboration with upstream developers.
Same as above (Grade: 1).

If I get my math right that gives a GPA of 1.8 out of 5.