Touch screen devices have become all the rage. They're pretty, offer a wide screen and pack enough high-speed connectivity to download content in a flash. Research In Motion (RIM) Ltd. this week joined the touch-screen party with the BlackBerry Storm. But the Storm is in elite company, with the recently announced Google Android-based T-Mobile G1 and the touch-screen trailblazer the Apple iPhone 3G. All of them have some similarities, but there are also some key differences. Here, we pit the three touch-screen goliaths " BlackBerry Storm, T-Mobile G1 and Apple iPhone 3G -- against each other in a head-to-head-to-head match up to see how the devices stack up in 14 different categories.