500px

UPDATE: The 500px app is now back in the app store, but it has received a 17+ rating for its potential for porn. We're glad to see it back, but wondering how this will affect other apps, like Twitter's just-released Vine app, which has already been criticized for showing off naked people almost immediately upon its launch. 

500px has just announced a new, paid service for users of the website, 500px Plus, which bridges the gap between free accounts, and the $49.95 per year Awesome account. With Plus, you'll get unlimited uploads, the ability to group your photos into sets, and analytics of your images.