Haven't dug into this yet, but it was recommended by Jon Udell as a way to manage all your passwords without using the same one for each site or having them written down somewhere. I'm hoping it's a more normal-user-friendly version of the mechanism I'm using, so I can start recommending it to everyone.
Another interesting looking javascript graphing library. Has some nice alpha-blending stuff that I'd have liked for the current project I'm working on (that's using the otherwise very nice jqPlot)