Comment 5 for bug 505440

quote from - http://www.djangoproject.com/weblog/2010/feb/06/12-beta-1/
on February 6, 2010 "Also, note that this release constitutes the final feature freeze for Django 1.2. No further new feature development will take place before the final 1.2 release; only bugfix work will be accepted in trunk until 1.2 lands."

If Django-1.2-beta1 is already in a feature freeze, it should be packaged into lucid. Ubuntu regularly has put software labeled beta into its distro releases. The final release of Django1.2 is already scheduled to come out on the week of March 9 which is before the lucid has its beta1 freeze.
see: http://docs.djangoproject.com/en/dev//releases/1.2-beta-1/#the-django-1-2-roadmap