I use Jason Osipas facial setup. I love it! ITs a long list of mouth shapes but its well worth it. He uses visemes, shapes you can see rather than phonemes, shapes you can hear. Some of the poses are mouth open/closes , upper lip up/down, lower lip up/down, sneer, ooooo, pucker, narrow, wide. All of these are of course split into left and right sides of the face. The there are different brow shapes. I recomend buying his book, "Facial Animation and Modeling Done Right" It really helps.
SeanC.