Mobile Advertising: If you want to market your business, forget the Super Bowl. Instead, spread your message on the small screen–the really small screen, as in cell phones. With nearly two-thirds of our nation’s population owning cell phones, according to CTIA Wireless, it’s hard to imagine staying competitive if you don’t. For businesses looking to capitalize, the cost of mobile marketing varies from very cheap (sending SMS messages) to expensive (sending video commercials). According to RBC Capital, U.S. spending on marketing and advertising over wireless networks is expected to reach $1.5 billion by 2010.