Google Body Browser

Google has released an awesome in-browser anatomy viewer to demo the new 3D graphics capabilities of their Chrome development version. It lets you explore the human body in all its glory in a Google Earth-like fashion. Individual anatomic layers (skin, muscles, bones, etc.) can be selected or deselected for viewing, but can also be made semi-transparent on an individual level. Labels can be displayed, and all anatomy is fully searchable.
The catch is you will need a WebGL enabled browser to try it. WebGL is a technique that enables 3D graphics within the browser without the use of plugins. Chrome 9 Dev Channel, Chrome Canary Build and Firefox 4 beta have this enabled by default. In Chrome 8 (the current stable version), you can enable it by going to about:flags (type it in the address bar), and from there enable WebGL. Below are two videos, one demonstrating the body browser, and one of a presentation by the developers.