I searched and didn't see this so I figured I would post this.
A iphone-ish app is available for the face hitting buttons issues. People with "endowed faces" hit mute or speaker-depending on which side of your head you hold your phone with which can be bad depending on what kind of call your on.....
It's called TalkLock - after you pick your phone up it will lock your screen after 3 seconds and requires you to hold a slider to unlock it while your on your phone.
this program is friggin awesome :D
I DLed it and installed, then tryed it out and it works great!
Thank god this works, 'cause I was pressing some funky stuff with my face during EVERY call and I didn't know what the heck was going on :D