The success of app stores has put dollar signs in the eyes of many app developers. <br><br>Aside from the potential payoff in terms of app sales, high profile acquisitions of app developers continue to make headlines. <br><br>If a single photo sharing app can go from zero downloads to millions of downloads, and eventually a billion dollar payday, so can yours. If a single drawing game app can go from zero downloads to a $200 million dollar payday, so can...