Hacker News Reader

I'm fairly convinced the most badass part of that is that he can just do ".distinace.m" and get it in meters. Of course there are other units if you prefer: http://code.djangoproject.com/browser/django/trunk/django/co... :)

The distance/area objects in GeoDjango are an under-appreciated feature. The docs have a more readable version of the supported units:

Rails' ActiveSupport has a similarly nifty feature, where 15.days.ago is a valid Time object, and it all just works out of the box.