Dave, what is your actual ADC ?
I hope you have read this :
http://theartofsound.net/forum/showthread.php?t=4866
In any case, digitising and streaming are two different setups. They have two things in common, though : a computer (you will need for splitting the digitized streams from the ADC into pieces/songs, then, perhaps for streaming) and a hard disk (for storing).
Then, of course, a good quality ADC can be a DAC, too, but this is not essential.