Sweeeet. I've been wondering for a while about doing Comet style realtime stuff in Django and wondered if Tornado would work. This post inspired me to search the Tornado mailing list and, sure enough, there's a great thread with a full example explaining how to do it. Very awesome, I love the internet.
For others wondering about how to do realtime in django, here's the thread: http://groups.google.com/group/python-tornado/browse_thread/...