I knew google can read my mind.
For some time now I was looking for something like GoogleEarth for human anatomy. I even thought about asking Google to make something like that.
Now I learned they did just that. They even did it as a showcase for WebGL which is part of the upcoming HTML5 standard.
Have a look at http://bodybrowser.googlelabs.com/
You will need a browser with WebGL support. At the moment the beta versions of Firefox and Chrome are known to work well.