Damian stop my stomach is hurting!
Basically, you need a good sound card!
This is one I am looking at:
http://www.tigerdirect.ca/applicatio...744&CatId=4491
Not sure where you are but if you can find one of them, or something similar with proper inputs (not a mic line) then you shouldn't have any problems with clarity.
I've tried mic lines to my laptop and pc for recording my music and they are not really any good.
Run a line-out from whatever the station is using to the PC/Laptop whatever.
Then you need something to stream with, which I don't know about myself.
And like others have said, probably some legal BS to get it online.