Editor's note: Apple has the first-mover advantage, and its App Store sets the bar. The result is a buoyant market for apps and ample opportunity for fast-followers to (perhaps) do one better. Benjamin E. Jacobsen - Co-Founder of Mobspot, Inc., a company championing "Mobile App developers and App users on any platform," and a new author to MSG - gives his take on the size of the market and the prospects for other pla...