Many languages have this kind of community IMO. After a certain size, it doesn't matter really how big the community is because there is enough to sustain help. After a certain point, it only helps in finding specialized sub-communities which need to be that minimum size too. I think almost any language that a person here would consider for some project or another has that community, and you'll really notice the difference w/ languages that don't. For example, SML is a language that is so tiny that you can really notice the lack of community (and free documentation...) compared to, lets say, python, or objective-c.