The biggest argument for mobile apps tends to be their ability to interact with the phone. For example, my Gmail app will tell me in my notification bar that I

The biggest argument for mobile apps tends to be their ability to interact with the phone. For example, my Gmail app will tell me in my notification bar that I have a new email, and Tweetdeck will tell me when someone replies to one of my tweets. To my admittedly limited knowledge of mobile phones this cannot be done by a web app. I still wish you good luck, as most apps in wide use on the iPhone and Android simply shouldn't "have" to exist (apps for news sites, shopping carts, etc) because they can be done just as well, if not better through a web app. If you succeed, I might be able to buy my grocery shopping on my phone on the bus to work rather than being told I can't because I use Android and can't use the iPhone app.