Great plugin - thanks!
Only one thing is missing in my opinion: tags are frozen when you open a webstite. That's not good cause users can only find that tags can rotate if they point their mouse at the tag cloud. Otherwise they rather won't discover this option.
Also, I noticed that here: http://www.goat1000.com/tagcanvas.php tags are in some initial rotation when you open the website. Is it possible to configure your plugin so it can behave the same way?