I don't see it as a negative.

Anything the community develops is available for Nokia to grab and use if they need it. If the MMS from the community goes live, and Nokia determines it functions exactly like they would need it to.. they would just then add the community one into the next firmware update I would think..

And then I'm glad at that point that they would abandon whatever MMS project they were working .. that way it'll free up those developers to work on something else instead of reinventing what the community already has done.

I think most often it would be the other way around.. Nokia would release a firmware sooner than the community would be able to finish a product as completely as what they have. The community develops for free in their spare time.. Nokia's people have a job to do it.

ETA:

Mostly, I think the community creates hacks and work around to do what people want - until Nokia's official one can come out and make it seamless and integrated.