A simple Mobile Web application multiplataform with Jquery Mobile and html5 ;)
with HTML5 jquery mobile application can make it look like a native application, and PhoneGap can pack this web application to be a full native application for all mobile platforms!
Yeah we thought it would be simple too. I spent a week making every single on of our files to work with jQuery mobile, almost launched it to production and it turned out nothing worked. But we are definitely planning on figuring a way to make a simple mobile interface.