Only a few short years ago, when mobile devices were still mainly cell phones and music players, the thought of a mobile revolution supplanting the computer revolution seemed distant. Computers ruled for three main reasons: more powerful hardware, better software and, most importantly, much faster access to the internet. However, we have seen a major shift in the way we use communication technologies mainly because wireless access to the Internet has improved dramatically and major investments have been made, and continue to be made, in mobile hardware and software.