SHOUTcast is a very popular stream service using the MP3, MP3 Pro, and NSV format. maintains a large directory of stations using Shoutcast software (the DNAS), as do we. Bouncyservers uses Shoutcast software exclusively because MP3 streaming is compatible with ALL media players and operating systems. Other formats such as Windows Media or Real Audio can only be listened to with a single player running on Windows. MP3 streaming with Shoutcast will expose you to the largest potential listening audience and give you the most broadcasting options. You can use BSD, Linux, Mac OS / OS-X, or Windows to source or listen to a Shoutcast stream.