We just released the Objective-C library for the entire TweetPhoto API. It is a set of drop in classes designed to allow you to get up and running quickly with the TweetPhoto Photo Sharing API.
http://code.google.com/p/tweetphoto-api-objective-c/ This library includes every feature you'll need to manage the entire photo sharing experience within your application - from uploading photos, commenting, favoritng, and voting to social feeds, user feeds, and everything in between. Please let me know if you have any questions whatsoever. Sean
