Last night around 10 my computer froze up, all sorts of nasty noises came from where the hard drive is located, then it resumed working. I plugged in an external firewire drive and started copying all my data files over as my backups are a little stale. During the course of the copying the system would occasionally freeze up and the drive would make more funky noises. Everything finally finished copying over sometime after midnight.
Guess I'll be heading to Fry's after working - I see a [link|http://shop4.outpost.com/product/4697788|500 GB SATA for $120].