hey i like to have my urls with my domain that way they point back to my site...
In a previous version pre-oAuth I hacked your plugin to use the Post ID and that worked ... I have not started hacking at your plugin again because I just installed it.
Tweeting short Post Names works ie http://www.mysite.com/test.php
But when i use a real permalink the tweet crashNburns probably because its over 140 char
I can also tweet from the direct tweet box from the Posts menu so i know my connection is good
I really dont like using url shorteners because it cuts down on back links which are very important for google rank even if they are postID urls.. better then using someone else's domain.
maybe i will hack on it later today or tonight and then release a plugin for your plugin but it really should be a basic option to use PostID when the Permalink is too long...