Author: Anders Eriksson (kryten.atari.org)
Date: 04-14-2005 17:51
I second this, an external mixer (not necessarily limited to two stereo pairs) is a good choice. I looked out for one a while back, then there were cheap ones with 8 channel input (4 stereo pairs) from Behringer for about 75 euros.
Checking now, the prices has gone down to under 60 euros..
http://www.behringer.com/UB802/index.cfm?lang=ENG
Audiophiles will probably kill me for that link though :)