Live Radio Streaming

How and what do i need to create an online radio station on d net with live stream.Or is there a software or script i can use?

I remember last year when I was asked to submit a proposal for a state government's radio station website.  I found this site quite helpful in helping me determine what the whole thing entailed, including cost:

http://www.streamaudio.com/site/Default.aspx

Then again, considering I lost the bid, what do I know 

Good luck!