Looks like Mango still has a few hidden surprises. As you can see, that’s an official instantiation of Internet Sharing on a Samsung Focus running Mango.

That’s the good news, that and it “works like a charm”. The bad news is it reportedly eats a lot of battery life. Our bet is this is hidden on some devices and builds and will presumably be a carrier option.

More info as it comes in…

Update: Justin says this is Mango 7720.68 but that his device has been flashed by someone at Microsoft. Insert thriller movie music
here.

Thanks, Justin B., for the pic and info!