Provides a standard API for multiple URL shortening services; since it’s open source, it’s easy for people to add support for new services. The Firefox Addon & Greasemonkey Script allow you to expand shortened URLs wherever you go & supports ALL shortening services. You can also expand URLs via the web at http://longurl.org/. Now you can always know where a link takes you before clicking on it.
Inspired by LongURL, http://PrevURL.com gives a screen shot of the link that the shortened URL points to as well.
Nice! Thank you!