As we all know, we cannot lock the screen while we talk. Not only drains battery, but also renders "handsfree" handsets completely USELESS. Why? The screen is still on while we talk and the touch screen reacts to all kind of touch and bumps.

Will on another thread commented that there were no updates for the locking screen, yet he said that they wont allow 3rd party apps to run in the background for battery concerns, however, no lock screen support is quite ironic, because turning off the screen while we talk SAVES battery.

Now, sign if you agree to make this update in the upcoming MR5. It worked once with the keyboard, hopefully it will work again. 

P.S. Sorry if this has been done before, and please point it out if it has been done!