Micro Cap Stock Trading/Investing

While the more liquid exchanges provide multitudes of opportunities, microcap stocks usually are driven by different dynamics, than the larger exchange traded assets. What are the dynamics that create the supply and demand, and investor interest in certain stocks and securities?

There is a lack of institutional backing which removes a large creator of demand. A lot of these stocks rely on news to push prices in any direction. Many times these types of stocks lie dormant in a sideways trading pattern for weeks or months on end. Anyone have examples of stocks or info on other things that drive microcap stock movement?