No, it was pretty clear from the start. MeeGo for N900 won't be supported by Nokia (pretty clearly stated, ie, no Nokia Care calls). Work on a MeeGo(.com) hardware adaptation for N900 was started.
I'll give you that there has been a lot of personality split between if MeeGo is end user (netbook) or a platform. In practice however, isn't Android a platform and what you actually use, is HTC Android (with google apps, which isn't part of Android)? Similar model with MeeGo.
Question: When are we going to see a schedule for a piece of software that I can use on my N900 without resorting to xterm or applying patches or dual booting, to make and receive calls without my phone crashing ? It's called Maemo
Seriously though: Only way to not resort to 'dual booting' is by it being preinstalled on your phone or you getting in touch with flasher somehow.
I can make and receive calls on MeeGo/N900. That it comes out the speakers instead of ear piece is because the audio policy daemon simply isn't a 1.1 feature. So it goes.