I loved it. Piranha 3D is what Snakes on a Plane wishes it could have been. It's not just exactly the shameless schlockfest I thought it would be, it goes way, way beyond it. Depraved, gross, disgusting, bloody kills, and so much boobs and ass it's basically a porno movie. Absolutely shameless, especially for a mainstream Hollywood movie. This is not a movie that can be discussed in polite society. But here, I'll say for the interested and like minded, it's fucking great.
In addition to what Excalibur05 said, Cirie also seemed to be the real brains behind the operation. She maneuvered herself into the Casaya alliance (remember how she was flatout told she and Melinda were the next two out in the second episode?)