Pretty slick, animation-wise. If I could make one design-layman suggestion...the thick, black border belies the unobtrusiveness of the plugin. Maybe a lighter, thinner border would be a better fit for the use-case of this plugin?
Yeah, I meant for demo, first-impression purposes. I know it's just a easily-changed visual tic once a developer decides to implement it...but might as well entice as many people as people as possible.