Well, apparently I solved this with a bit of hacking. I'm writing an article about how to install Django 1.3 in DH.
The installation process is very basic (and probably not too stable) and its basically create a virtual environment with our preferred modules, python version, and modify the PYTHONPATH to prepend our locally installed django modules before the system-wide ones.
You can see the article here: http://blog.oscarcp.com/?p=167
If you see any errors, or want to recommend me some other way of installing django 1.3 (or even scold me for doing this), I'm all ears!