First launched back in April 2009, TweetPhoto has been steadily building out its service with multiple useful features, including Foursquare integration and a partnership with Kodak. Today, the site is getting a huge overhaul with more social features and a new iPhone app. TweetPhoto has now added the ability to sign in with Twitter OAuth, Facebook Connect, MySpace OAuth and Foursquare OAuth so that a user of any one of these social networks can use TweetPhoto as a stand alone photo sharing service. The site will also be rolling out LinkedIn support in the next few weeks. In addition to login capabilities across all four of these services, TweetPhoto users can also link these social networking accounts together. Once you link your Facebook, Twitter, MySpace , or Foursquare accounts on the site, your photos uploaded to TweetPhoto can be simultaneously broadcast to all of the networks. Third party applications that use TweetPhoto as the default photo uploader such as TweetDeck and Seesmic's BlackBerry app, will also include this functionality.