Try this: It's four racks from IKEA (do you have IKEA near you?). You can probably work this out by the scale, but they're about 6'6" high, and the three racks together can take over 600 cds. We have about 70 DVDs, all bar 2 are in the rack on the right.
Holds 600 CDs, and all shelves but the middle are adjustable (it's a brace!). Easy to put together, too. I need to punt for one of them soon - I have media spawning on my floor!
Probably a little less expensive than the IKEA....but the IKEA piece is very nice.