Lipspeaking is an art. Definitely. (Or should I say deafinitely?) Trained lipspeakers listen and repeat: they listen to a speaker and repeat their words without voice to a lipreading deaf person using clear lip patterns and additional communication cues, such as mirroring the speaker’s rhythm and emphasis on certain words to make it easier for the lipreader to pick up what is being conveyed in what can be a high-stress environment, such as meetings and conferences.
More at http://deaflinguist.wordpress.com/2011/11/25/lipspeaking/