I've been using Django Evolution for my project, AppRabbit.com, and it's worked fine because schema changes are so closely controlled, but when trying to use it in a team settings on a separate project we're finding that it fails at simple stuff like changing field types. Checking the forums usually nets you a patch of some sort, but it would be nice if everything worked out of the box. I really hope that the new maintainer, Christian Hammond, will be able to move the project forward and really make it work for more scenarios.
P.S. Yes, we've tried South, and we may still end up going that direction, but we've had a lot of trouble with that too, so we'll see how things go.