A simple URL-shortening app that was live-coded during Jax Code Camp 2007 as part of my Distributed, Rapid Application Development with git and Ruby On Rails talk.
Use VURL as your custom URL shortening service in clients like Tweetie. You can submit an html or a json request to the service.
http://vurl.me/shorten?url=http://mycrazylongurlthat/desperately/needs/shortening
will return a plain text response with the shortened url:
http://vurl.me/OMG
Or use json:
http://vurl.me/shorten.json?url=http://mycrazylongurlthat/desperately/needs/shortening
will return a json response with the shortened url:
{:shortUrl => 'http://vurl.me/OMG'}
See contributors file