My Moodle bar is almost ready for public release. I have cleaned the code up (a lot), the bar now installs with just one simple PHP include tag in the footer of your Moodle theme. The buttons now have a CSS based tooltip rollover (like Facebook). I just have a few Internet Explorer 7 glitches to take care of.
I am also planning a notifications module for the bar which will alert users of messages, deadlines and calendar events.