Which is the “community” of a MOOC like this Rhizo14 ? Is it the union set of all people registered to any of the P2Pu forum, the Facebook, Google+, Diigo and Flickr groups and all who ever blogged or tweeted or retweeted using the hashtag or commented on any of these in any week? This would mean a large number, including rather passive participants who fired a single reaction and then left again, but it would still exclude many who may be eagerly reading, and who may be actively engaging with the discussions in their heads and may be often considering a comment just short of finishing it.
While a “network” is obviously open ended, I am not sure how the term “community” is usually meant by native speakers of English. I searched my dictionary back and forth,
and for me, the word has many connotations of a close or narrow grouping, with many senses like religious fold or congregation, or confraternities and comradeships. And even the word senses of formal administrative memberships, like in municipalities, parishes, or alliances and unions, don’t fit well, either, with what is going on in a MOOC, where people loosely gather around some weekly topics.
I like Downes’ recent depiction of the course content as the McGuffin:
“The content, we call it the McGuffin. And it’s the thing that brings the people together, because they’re interested in that subject. […] It’s the thing in a movie that all the plot evolves around […] it does not matter what it is because what’s interesting about the movie isn’t what everybody’s chasing after. It’s what they do during the chase. It’s how they interact with each other, […] So, the content of a course is just a plot device to get people together, to communicate, to interact, to take part in this common exercise.” (More here.)
IMHO, this description, fits much better with “network” than with “community”.