Boondock Saints was a great fucking movie.
Kobe Tai's movie was Very Bad Things. Chasey Lain had a small role showing her tits in Tales From The Crypt: Demon Knight.
There's a whole list here at
http://www.mrskin.com/Stars/Porn_Star.Careers.1.htm but you've got to weed through it because there's B movies and late night Cinemax crap listed as well.