I see that Jukka Eklund from Nokia has announced a "MeeGo 1.2 Developer Edition for N900". This is an announcement of a project, not yet something downloadable for end users. See the meego-dev mailing list post and the wiki page linked off it.

This seems to be somewhat separate to the existing MeeGo N900 hardware adaptation effort led by stskeeps (wiki page), although presumably and hopefully the two teams will liaise closely. I don't know how many people within Nokia are working on this new Developer Edition - does anyone know?