So, for those of you who were on the fence about building iPhone applications using Web 2.0 technologies, think about this: Your potential list of application users is about to grow beyond users of the iPhone, and will include a crapload of people buying new iPods. If you think about the ubiquitous nature of WiFi (well, semi-ubiquitous), you're going to have people with iPod Touches hitting your application from coffee shops, airports, offices, hotel lobbies, hotel rooms, conference and convention centers, and a lot of restaurants.