SitOrSquat, which features user-generated recommendations of the nation's best public restrooms, was such a hit that Procter & Gamble, maker of Charmin, signed the toilet paper brand as a sponsor. It then rolled out a new SitOrSquat mobile application this year. With 400,000 downloads, the free app has become one of the most talked about among consumers and companies and is one of Forbes CMO Network's top 10 branded mobile applications of 2009. So what makes a brand successful on a handset?
