Since the days of Marilyn Chambers in Behind The Green Door ['72], there has always existed a glass ceiling (or K-Y floor) for those that attempt to transition from adult to mainstream cinema. After her porn debut, Chambers starred in Rabid ['77] from noted auteur David Cronenberg ( A History Of Violence, Videodrome, Dead Ringers ) but never had a mainstream role again, if one could call Rabid mainstream. A few months ago, Chambers was found dead in her trailer park home at the age of 56, the former Ivory Snow girl as the most famous victim of a soulless industry, a cautionary tale for all to heed. [For more cautionary tales than you can shake a dick at, read The Other Hollywood: The Uncensored Oral History Of The Porn Film Industry by Legs McNeil & Jennifer Osborne.] And then there's Sasha Grey. Grey is the star of the newest film from Oscar-winning writer-director Steven Soderbergh ( Traffic, The Limey, Ocean's Eleven ) entitled The Girlfriend Experience , t...