Cute toy. But it really makes it obvious that Star Trek got it wrong. Your faithful reproduction of the interface makes it clear that, as interfaces go, the tricorder's interface really stinks. Lots of big, unnecessary buttons, a tiny, tiny screen, and a generally poor layout really makes it clear that the tricorder is only useful as a prop in a TV show; it would flop as a real-world device. Strangely, they got it "right" with the on-board computer interfaces (touch-screen LCARS), but the tricorder is all physical buttons and almost no screen!

Star Trek should have had pocketable all-in-one devices, like what's happening in the real world. We were watching Bourne Ultimatum last night, and one of the toys caught my eye -- guns with wireless streaming cameras and pivotable LCD screens built-in. Something like this on Star Trek would probably sound like:

"Away team, set your phasers to record."

Also, there's a little mouse pointer floating around on the screen in your simulation.