IO-hopeful

I am currently applying to I/O Psychology PhD Programs for the Fall of 2012. I was curious about emailing POI beforehand. I have heard mixed things from several graduate students. Would it be beneficial to contact them beforehand, hoping that they remember me when the application process comes around, or is this just bothersome to professors ? Perhaps some current graduate student could chime in here. Did you/did you not contact them before applying? Do you feel it benefitted you? etc etc etc . . . . Thanks for the advice everyone!