When done well, iPad-enabled shopping experiences have been paying off for e-commerce sites. Take for example, Fab.com, which is forecasting the iPad to account for a quarter of its revenue in two years’ time. But unfortunately, not all online retailers have yet to capitalize on this trend. By year-end 2011, none of the top retailers’ sites offered an iPad-optimized version, and many didn’t offer a native iPad app, either. Enter Shopmox. Launching today, this iPad app aims to bring the mall to the iPad ...