Inspired by a previous thread*, I've written a plugin to automatically
abbreviate excessively long URLs:
http://fnd.lewcid.org/svn/TiddlyWiki/plugins/ShortURLPlugin.js
There's a quick demo here:
http://fnd.lewcid.org/tmp/ShortURLPlugin.html
I haven't tested this with a huge variety of URLs, and there's probably
room for improvements, so constructive criticism is welcome (as always).
-- F.
* http://tinyurl.com/yvkk7s
(http://groups.google.com/group/TiddlyWiki/browse_thread/thread/d21355b520e8cece)