I am going to be trying this tool out soon. I know some of my colleagues will be excited about this. I especially like that the designers built it on top of HTML5 which in the long(er) run it will make it a viable tool to train folks on how to use because it will be relevant. It also plays nicely with vis.io which is a plus, too.
This wiki is chockful of resources collated by my good friend, Kim Caise. I really can't recommend this resource enough. If you are looking for something, start here!