Except it's better. We allow you to upload multiple photos and you get an image gallery. We offer the full size download of the image, or a zip file of multiple images. It posts to *your* Posterous site, which may have a custom domain and Google Analytics. And we autopost not just to Twitter, but also Facebook, Flickr, and many blogs. Oh, and TwitPic is down all the time. That's no fun.

Michael Arrington, Guy Kawasaki, and Rainn Wilson all use Posterous in place of Twitpic. They email photos to Posterous, and we update their Twitter and Facebook accounts. We're extending this to the desktop and iPhone apps with this API.

Coming soon: support for audio, video, and other files. We can handle it all.

If you use a Twitter client that has TwitPic support, email them and let them know they can add Posterous support today! We use all the same methods, responses and errors, so integration should be a breeze.

API documentation can be found here.

See the release on Techcrunch here.