Ok. My first Greasemonkey script is available from userscripts.org (http://userscripts.org/scripts/show/9740).
I have been using Greasemonkey for more than a year. Recently I downloaded 2 userscript, GMail superclean and Gmail air, which inspired me to write a script.
Two days ago, I was assigned to do url rewriting for our free-classifieds site. As usual I started googling and found a good site with online tools for url rewriting (seochat.com), but the advertisement on the site annoyed me, since I was working with long urls. So, I created this script. Hope you will find this useful.It certainly helped me.