Using Jython with Django?
I have not used Django with Jython, so I can't speak to that specific issue, but I've used Jython for other things and I've found it quite stable of late, and just as easy as plain Python.  I believe the "core committers" in Jython are substantially fewer than in C-Python (maybe 1/3 the number or less), if that's what you mean by "developer community", but I'm not quite sure what's the point in asking about this -- are you considering joining either developer community (Jython or Core Python) and wondering where you could have the best impact?
If that's the case, I think the key issue isn't really how many others are already helping out, but, "what do you bring to the party" -- if you're a JVM wizard, or an expert at any important Java framework, you could be a real boon to the Jython community while that same skill would help much less in the C-Python community; vice versa, if you're a wizard, say, with autoconfigure and C-coded system calls, that would be precious for the C-Python community, but not as useful for the Jython community.
I am planning to use Jython with Django. I want to know how stable the Jython project is, how easy to use it is, and how large its developer community is.