There was a fair amount of community involvement and some other companies. Intel and Nokia were the major players here.
Also Nokia is supposed to release a Meego phone; they said that they will be using Windows mobile to replace Symbian in low and middle tier devices, and they haven't really commented on upper tier.
To be honest, I probably won't be buying a Meego phone from Nokia if they ship one. My N900 is fun, but I feel it doesn't get enough attention from them.
Obviously, the biggest factor for Meego's success is if it can get any real attention from the media and consumers.