Just out of interest, I thought I'd start a thread on insider trading. I am hoping for concrete examples, not just rampant speculation.
To start the ball rolling, have a look at the volume and price action of EXR towards the end of june. On the day of the massive drop, it was announced that an oil well was a duster. However, it looks like the market was partially informed before this.
Another example was BGF before announcing a doubling of gold reserves. This leaked so badly that the SP actually decreased after the announcement as all the speculators tried to sell the fact (actually that worked out damm well for me as I loaded up on the options LOL).