This isn't the plugin that I've been raving about building for the past week or so but just a plugin I thought about and wrote in my lunch hour today. So just hold out a little longer before I release my first full blown WordPress plugin. Anyways, read on and download the plugin, it makes my life slightly easier so...
What does it do
It allows you to type '[@username]' in your WordPress posts or comnents to reference a user on Twitter. So if you typed [@BenjaminReid] into your post it would output:
Download and extract the zip file and upload
/wp-content/plugins/ and then just hit activate in your plugin admin area.