Offline web apps

So here’s a thing I’d like to see. I’d like a standardised logo/button for mobile web applications that means ‘this web page will work offline on your phone’. I’m thinking of things like Pie Guy, that use HTML local storage and offline caching and so forth, so they can be added to your home screen and used just like a ‘real’ app. Tapping the icon should tell you what it means and explain how to save the app locally. And it should adapt itself to the local platform, be that Android or an iPhone or an N900.

Get to it.