Ask Slashdot: Affordable, Functional Audio Mixers?

hfcs asks: "I'm looking for sources for an affordable, 4-6 channel, compact, stereo, line-level audio mixer. In my office I have 4 PCs (Linux, W95, NT, Mac) and CD player, each demanding their own speakers for audio output. Low end pro-sumer stuff (Radio Shack & the like) start at $200 for this, but it's huge. Decent mixers start well above that. A master volume would be nice, but since each device can do it's own output level, so I don't need channel level control. I just want to be able to hook everything up to one nice set of amplified speakers rather than 4 independent mediocre sets without damaging any of the sources. Any suggestions?"