I made a mobile web app about six months ago, and this is what I heard over and over again from users: "Can you please please please make it a native app?"

Just to get our feet wet, my partner and I proceeded to write two simple iPhone apps. The first did 10x better than our mobile web app (with much less effort), and the second did 100x better. That was enough to convince us, and now we've shelved mobile web development in favor of iOS development.

That's just a personal anecdote, of course. I can't speak for the guys (or gals) behind Coder's Coffee. Overall, though, I think this is responsible for a lot of the interest we're seeing in iOS development.

It also helps that Apple has done a great job with XCode and the iOS SDK. Developing for iOS is really a pleasure.