American City Business Journals, which publishes business periodicals throughout the US, says it has found that the iPad's popularity goes beyond corporations like the Fortune 500; its use in small and medium-sized businesses (SMBs) rose from nine percent in 2010 to over 34 percent in 2011, a near-quadrupling in penetration. The full report, due March 31st, surveyed 1,400 business owners and CEOs.