zlacker

I like this idea as well and I think it supports how a digital community actually works. For example, some people are great at finding awesome, relevant, high quality articles to submit. They should be encouraged to do so by earning a particular badge.

Others are better at commenting, and maybe there are even different classifications of commenting or different badges.

You would be able to incentivize behavior (commenting) and then narrow it down to a particular type of commenting.

One interesting badge might be the efficiency badge, and that would be generating the most points or badges per minute on the site.