Had some time to play around with iOS 7 concept. This is how I imagine iOS7 keypad. People with who I interact most is automatically added to the "hot list", and you don't need to think about binding people to hot keys.
What do you think guys?
P.S. @2x is always better and there is a lot more details in attachment ;)
Thanks http://dribbble.com/pixeden for icons and iPhone 5S mockup!