Hathaway was topless in several scenes. And in that one scene where she was teasing the one guy, she got semi-topless and felt herself up, and also stuck her hand down her panties and played with herself.
Her co-star Bijou Phillips didn't have as much airtime, but she got the beginnings of a DP in the climax scene where they were fucking their way into the mexican gang. Some pretty edgy stuff for a mainstream movie, but not nearly as provacative/explicit as I thought movies like The Color Red, The Lover, 9 1/2 Weeks, and Basic Instinct were.
Another favorite of mine was "Sex and Lucia" starring Paz Vega (available streaming from Netflix). It's a spanish mainstream flick, (in spanish of course) and has subtitles, but is seriously hot. Paz Vega was from that movie with Adam Sandler and Tea Leoni where she was a maid/nanny... "Spanglish" I think was the name of it.