The "Real Python! Blog" has a new tutorial up about how to migrate an example Django application to Heroku and automate the deployment process with Fabric. The app is a simple message system and the database is MySQL. It even shows you how to convert to PostgreSQL, which is the default Heroku database.
The tutorial additionally shows you how to set up Amazon S3 storage for the app. When it's all said and done, you've got got the same ease of use that a Rails app has in deploying to Heroku. Just type the magic words: $ git push heroku master