Go to http://raphaeljs.com/ to see some of the demos. This is an awesome library and I just had to start experimenting with it as soon as I found out about it.
Have you noticed the vertical menus on the side? Well, the rotating text is done using Rapaël! Open up joe.js to see how I do this.
The example on this website is pretty basic so you should definitely check out the demos on http://raphaeljs.com/. However, I'd like to hear your opinions on the usability of the menus. They are a bit of a gimmick but I think that they are quite intuitive as they are similar to tabs that you can insert into folders to keep your place.