Just an FYI, the newest version of Django (1.8) now supports Jinja or Django templates by default and you can plugin other templating engines if you want.
Did you try to use Jinja2 templates in 1.8? There is hell of a bootstrapping to do until you can actually start working with these. Don't even try to use both at the same time within the same project. You'll end up crazy before you can make Django load the right template.
No I haven't, still on Django 1.6 at work but I keep up with the newest developments. That's a shame, from what I read it sounded like it was just a simple config setting that would allow you to use Jinja over Django templates.