Build an iPhone Webapp in Minutes with Ruby, Sinatra and iUI
While Mobile Orchard and most developers focus on the development of “regular” iPhone applications using the iPhone SDK, it’s also possible to develop iPhone-specific apps as “webapps.” If you’ve used Google Calendar or Google Mail from your phone, you’ll have seen an iPhone “webapp” in action. While webapps can’t get access to all of the goodies offered by the iPhone SDK, they’re more than adequate for many tasks – they also don’t need to be “approved” and won’t appear on the App Store.
If you’re interested to see what iPhone webapps are available, Apple has an official index of iPhone webapps. Currently there are over 3000!