Gaps between Jython and Django
Jython does not have __builtins__ as a module. Django adds "_" as a convenience method for calling gettext in django/conf/__init__.py. Jython needs an explicit import of __builtin__ to achieve the same effect - django has been patched recently for this.
Jython does not have sys.stdout.isatty. Jython should get added to the exclusions around that call in django/core/management.py (win32 and 'Pocket PC' are already excluded).
Jython does not have os.W_OK needed in django/core/management.py. This probably will not be hard to add this since java.io.File has a canWrite().
Jython does not support non-str keys in __dict__ right now. If Groves' HashMap replacement works out maybe this issue will disappear. Problem encountered in django/utils/_threading_local.py
Something goes wrong with re.compile(u"([\u0080-\uffff])") in django/utils/text.py I think it is a lacking in our array implementation but this needs more investigation.
stringmap (or the __dict__ implementation) needs a pop(o) method.
func's and classes need __module__