This looks like is could be a pretty interesting plugin. We will see.

Well, my first attempt at this did not work so well. I have my own domain (tyni.info) and I am now trying to use it.

Well, at least I got yourls to work. However, I still having trouble getting the twitter plugin to work.

All right, I got this to work. The version I installed today worked fine with my yourls installation using my own shortened url. Cool stuff.

I used the the version 1.2.1 of the plugin (http://planetozh.com/blog/yourls-wordpress-to-twitter-a-short-url-plugin/). This is the one that worked for me.

I downloaded and installed yourls from http://code.google.com/p/yourls/downloads/list.
I downloaded and installed t he yourls WordPress plugin from http://planetozh.com/blog/yourls-wordpress-to-twitter-a-short-url-plugin/.