[millstone]

They did not "literally duplicate the iOS functionality." After months of work, and modifying their own framework, they produced...a technology demo, which omits core functionality like searching.

Also, I don't agree that the Fastbook app is HTML5 "done properly." From their article:

So the Fastbook app is the first to make use of a brand new “Sandbox Container” which programmatically detaches complex views and renders them into their own iframes, and thus partitioning the DOM tree...events, positioning, styling, and JavaScript code have to be proxied between the parent window and the child sandboxes.

I would characterize this as "heroics."

[chrisringrose]

No, of course they didn't duplicate every bit of Facebook's functionality. You missed the point, I'm afraid. The very specific functionality they targeted performed as well as the native app, and in some cases, better.

They are both pulling the same data from Facebook, and just displaying it to the user. One is native, one is HTML5.