Lately, there has been a rush of activity around building native applications for the various mobile devices.  The latest explosion of activity started in 2008 with two events: Apple opened-up the iPhone to 3rd party development by releasing the iPhone SDK,  and Google released Android as open-source software.  In 2010, of course, Apple fanned the flames with the release of the iPad, and Microsoft Windows Phone 7 looks like it will be a strong platform for mobile device custom development.  But even before these events, there had been waves of popularity of mobile development coinciding with the rise of Blackberry and before that, Palm devices.  It even used to be the case that something didn't have to be a phone to be a mobile device.  But now that most mobile devices are network-capable and the bandwidth available to them has expanded dramatically, the question becomes, "Do we need discreet native mobile applications, or can a single web a