From what I've read Meego is probably 80% Moblin and 20% Meego.

A gross over simplification but my guess is that it's pretty accurate

Only the telefony stack and some other components from Maemo made it into Meego.

And of course Harmattan is just the UX overlay for Meego.

I'm really excited about the Meego push as a whole.. Application developers will have devices ranging from handsets to tv's to in car dash components. This has never been done before on this type of scale.

Ironically Meego seems to be the anti-thesis to Iphone OS.