I'd try epoxy, I've used it on some (non-computer-related) stuff and it works great. If that doesn't work, try super glue. If they're metal pieces you could always try soldering, but that is probably going to be out of the question or useless.
I still think just permanently fixing the screen open and buying a new laptop would be the better solution, especially if that's going to be your college laptop. A hinge that has been repaired with epoxy or glue probably won't hold up very well through the intense use that classroom use will probably put on it.
(dv9000's have this problem too? ...NOOOOOOOOO