I wanted to play with Django, so built this "toy" project to kick the tires. If you are on twitter (and don't protect your tweets), check out http://fun.thinkst.com/land.
It's a very simple application that will grab a list of the people you follow, then grab the list of everyone they follow, to give you the top n% of people they follow that you dont.
My favorite feedback on it so far was:
Reason enough for me to call it a success :>