Western Digital My Book Premium 500GB USB/FW 400 Ext Hard Drive
Had for a couple of months and no complaints.
I use the drive as a storage place for my media and such and I haven't had a problem yet.  I keep it in an underventilated place, and it never gets very hot.  The only way I know it's on is by looking at it, can't hear a thing.  My laptop doesn't have a firewire port, so I use a PCMCIA firewire card and it works fine.  I'm completely satisfied with it.  This refers to the 320Gb version, but it's all WD baby.  I wish I knew they had a 500Gb version for $50 more than I paid for mine.  Live and learn.    Fast forward to 2009 - Drive busted.  Search \\"click of death\\" for explanation.  Lost all photos, music, everything overnight.