Thanks for the feedback! It's true: the downloads number is, by itself, fairly meaningless (as I try to touch on here: http://pythonpackages.com/about). But I like the tongue-in-cheek aspect of it e.g. "My package has been downloaded X times!" The site started off being called "vanity" for this reason.
As for djangopackages.com stats (now called django.opencomparison.org), I plan to integrate with it via their API. So I'm sure I'll be able to display the number of "I use this" and other useful stats.