Live 356 will provide you with free bandwidth for your server, but they do insert an ad at the begginning of your stream. If you have a good connection like fast DSL or cable you can host your own server, check out the online docs at shoutcast.com and you can download the appropriate server version. Or if you're so inclined you could go with a proffessional hosting company to host your SHOUTcast. Offhand a company you may want to check out is http://www.wedgemusic.com
, they seem to offer pretty competitive rates.