[timmins]

I've followed LukeW's version of reachable areas of the screen in my UI design. I think you've improved upon his.

I also find it fascinating how Facebook's main iOS app and Paper (per your article) conflict with your reachable zone. In the major app, they relegate the Search action in the farthest corner from right hand users. In addition, their overflow button on the bottom tab bar sits in the other 'Ow' zone.

Great write up.