beanstalkd (http://xph.us/software/beanstalkd/) also has similarities to this, and for non-Django / simpler needs, it may be better. It's basically memcached repurposed into a queue server.

A "task" would be equivalent to a script which only looks for jobs in a certain bucket (or "tube" as they're called). You can run as many clients on as many machines as you like. Obviously, since it is memory-based, you'll lose the queue in the event of a system crash.

That being said, as a rabid Django user, this is definitely going into my bookmarks!