I expanded the application to support more URL shortening services. Currently it supports: tinyurl.com (provides same interface as json-tinyurl), goo.gl (provides same interface as ggl-shortener), safe.mn, is.gd, v.gd, mcaf.ee, linkee.com, cli.gs, (std.li*), tinyurl.ms, and "hidden" support for bit.ly (and j.mp, which is same as bit.ly). I added also a sample URL shortener in javascript for the (non-hidden) services, for example: Sample linkee.com URL shortener.
*) std.li API does not work anymore in June 2012, removed from the list
And here's another example of usage, a hack to add...
Short URLs for blog's posts
This requires template editing. Edit also Widget templates. Find (partial line):
post-footer-line-3'and about 8 lines later:
</span> </div>Add this code after that </span> </div> line:
The above code includes tinyurl, googl and safemn services. It is easy to add, remove or change the services displayed. Hack is installed on this blog, for demostration there are five different services offered here, but in practise I think it is better to limit the shortening services to two or three.