Can someone explain the LSAT Curve?

I took the December 2010 LSAT and have been looking at discussion threads regarding this test and I keep seeing things about the curve, and how a lot of people are predicting that it could -9, or -15, -16, etc. I read somewhere that a minus 9 or minus whatever number means you can miss 9 questions (or whatever other numbers) and get a 170. Is this correct? My other question is, what would a -9 or -15 curve mean for someone who averages 150 or 155 on their practice LSAT exams? From what I read, this number (150 or 155, etc) is already adjusted to the curve, so does a -9 or -16 or whatever make any difference for someone who scores in that range, or does it mostly just make a difference for those who score closer to 170? Sorry, I know I rambled a lot in this question but the anticipation for the score release is killing me right now and I'm really curious about this curve and if it might be at all beneficial to my lowly 155's on my practice exams.