This could have been pre-android days

it was taken this week.

From your experience, looks like Django will be a good bet for you. Try it out http://djangoproject.com

Or Ruby on Rails http://rubyonrails.org/ . . . but pick Django as Python > Ruby :P hides

http://railsforzombies.org/ is also fun if you have some spare time. Project-based video tutorials for Ruby on Rails.

Zach's idea is on point. If you are looking for a committed community, the best way is to get them committed from the start. The best will survive the test, and this will result to a richer community.

Quality precedes quantity