Man. I have over 20 gigs of MP3s (over 4,000 individual files) and I've only ripped about half of my CDs. Good lord.
The good news is that I just got a 120GB 120GXP from my buddies at IBM and 2 18GB U160 IBM's. Plus, I have a free Adaptec 29160 coming my way, and I'll go ahead and stick my 36GB U160 Seagate Cheetah on there too. 72 GB of U160 goodness. Ahhhhhhhhh.
Anyway... yeah. I have a shitload of disk space in my main boxes, and I have a shitload of files soaking up that disk space.