Just in case.. here's the link to one of the calculators: http://www.hourumd.com/
I think that that particular calculator is garbage. Just for example, a 164, 3.33 only has a 66.67% chance of getting into UNLV? Please... I think that they have a really narrow self selected group that highly skews alot of their results.
With that being said I do believe that some admissions calculators can be pretty accurate, the LSAC calculator corresponds well with each school's ABA numbers, chiashu, at least when not going solely off of LSN, does as well. I think that LSN has too small a sample size to be fully useful for an accurate model, though it is the only place I can think of that has large amounts of data on scholarship awards.