There's a really nice info graph on techcrunch explaining dilution of stock.
http://techcrunch.com/2011/10/13/understanding-how-dilution-affects-you-at-a-startup/
After reading it I wonder if someone could better explained the statement at the end of the graph. Why would you want to avoid "participating preferred stock"? Is this because there is only a fixed dividend and you are not able to get more than that when selling the company?
Thanks