This my be the wrong question since I'm not too familiar with Heroku, but is anyone working on something similar for Django?
Heroku is a cloud-based deployment and hosting solution for Ruby apps (and soon to be Node.js javascript apps too). Google App Engine is for Python and Java.
The same exact code that you would deploy to a VPS can run on Heroku without issue, save some limitations like the read-only filesystem. That's a big plus.