It's a matter of apparent perspective.

moblin.org was handled by Intel employees that could get into the strong confidentiality of the MeeGo pre-launch, and they are a nice % of Intel guys you are seeing.

There is plenty of Harmattan/MeeGo development from Nokia developers and surroundings at http://maemo.gitorious.org . They are public and visible, just not seen yet as MeeGo. It takes one MeeGo git repo and the move there. One of the many things in the queue.

It's been less than a week, and we are talking about drastic changes in working processes (while working at full speed, as usual).

Also I guess more developers from both sides will start showing up in MeeGo when the detailed architecture is published and the code infrastructure is in place with maintainers, specific lists / IRC channels and so on.

Not everybody is desperate showing up in a single generic crowded mailing list with plenty of noise and strong emotions. Even less if you are specialized professional developer. Even less if you carry a @nokia.com or @intel.com.