Seriously. I enjoy every Show HN, but this one left me hanging. No demo, pictures, video or description. Just a button to log in to Twitter. I don't have a Twitter account and a good demo might have pushed me into getting one in order to become a pic feed user. Please op, do not take this as harsh criticism, but as feedback from someone who really wanted to try put what you built.
yeah, it's only for twitter users - the code is open source, added the github ribbon, so you can check what it does - just reads your tweets and discards the ones without images...