If you intend on listening to Ogg/MP3 streams, you can capture them and save to disk for listening later with the following utilities.
Streamripper records shoutcast streams. If the stream contains track info (meta data), streamripper creates a separate file for each track.
GNU Wget is a freely available network utility to retrieve files from the World Wide Web using HTTP and FTP, the two most widely used Internet protocols. It works non-interactively, thus enabling work in the background, after having logged off.
Wget is far more than a stream grabber!