Sound transport

[Lord of Gore]

Hy guys,

I have been presented with a problem that is entirely new to me. I need 
to transport sound that enters line-in in a soundcard of computer A to 
line-out in a soundcard of computer B with no or little loss in quality. 
Let's say media (transport) is solved. How would you solve this? I am 
interested in all kinds of solutions, drop a few words
even if you think your solution is bad for quality.

10ks in advance