New York–Although 40% of the U.S. population is expected to subscribe to a wireless Web service by 2006, mobile commerce (or m-commerce) will account for less than 2% of all online shopping, according to a report by research firm Jupiter Media Metrix. The report estimates that less than $4 billion in shopping and travel expenditures will be transacted on Internet-capable mobile phones in 2006. But shopping-related content on mobile devices is expected to influence PC Internet commerce and brick-and-mortar sales in 2006.