Great stuff from 500px (the awesome photo sharing site) today. First of all they have released the 500px Android app for both phone and tablet, giving android users all the loving of a full on site browsing and if you log in, all the voting, sharing, etc goodness from the site.
Secondly the iPad app has been updated with retina display graphics for the 3rd generation iPad (both for the UI and images, which got a 30% bump in pixel density), new UI and native twitter sharing.
Great stuff! As always you can find my portraits up on my account on 500px.