Voice dial - Dependant or Independant
...but hey! let's hope LG surprises us with one anyway.
As far as i know, this would require the creater of the voice dial to be the only one capable of activating said feature. I hear the vx9800 has independant, where you can say "digit dial" and dial the phone # by saying the individual digits out loud. This feature would be incredible on the 535 but it's not there.