The Capital One ShareBuilder iPad application links to an online investing site that permits trading of stocks, options and ETFs as well as typical online banking. It uses custom modules to allow users -- including those without a Capital One account -- to incorporate a Wall Street Journal video channel, for example. "Mobile is huge for us. Nearly 15% of all our trades are done on a mobile device. And we fully expect that number will continue to grow thanks to the new iPad app," says Brandon Potter, Capital One ShareBuilder's head of product development.