I just posted a financial analysis I did in 2006. The challenge was to canvas the entire space of novel materials (except bio), with particular interest in nanotechnology; look for a viable publicly traded alternative energy company; and then buy and hold that for three years with no risk management (e.g. options).
The name of the company has been obscured, but here's the graph. It was $9 when I recommended it, and roughly $31 now. (Between $25-30 in June '09, so the ROI would be about 3x.)
Of course I was looking not only at traditional financial performance but also applied social capital ideas to the analysis.