pylons-discuss - join
Pylons is a Python Web Framework aimed at making development, distribution, and deployment faster and easier.
Low activity, 1673 members

Subversion development - join
A google-groups mirror of the subversion-dev mailing list. Please see http://subversion.tigris.org/servlets/ProjectMailingListList and http://subversion.tigris.org/mailing-list-guidelines.html for etiquette and other information.
Medium activity, 142 members

Django users - join
Discussion group for Django users. Django is a high-level Python Web framework (djangoproject.com).
High activity, 11257 members