In a startling piece of data exposure and transparency, Stephen Wolfram (of Mathematica and WolframAlpha fame) has published a load of visualizations of data automatically collected about his life going all the way back to 1990.  The result is several graphs like the one above analysing keystrokes, email, calendaring, and more.

Again, there are some life trends visible. The gradual decrease in the early 1990s reflects me reducing my involvement in day-to-day management of our company to concentrate on basic science. The increase in the 2000s is me jumping back in, and driving more and more company projects. And the peak in early 2009 reflects with the final preparations for the launch of Wolfram|Alpha. (The individual spikes, including the all-time winner August 27, 2006, are mostly weekend or travel days specifically spent “grinding down” email backlogs.)

via Stephen Wolfram Blog : The Personal Analytics of My Life.