Quick and easy way to stream an MP3:

1) Open a text editor and add a line to your MP3 file
http://www.MyDomain.com/songs/MySong.mp3

2) Save the file with the extension of .m3u
MySong.m3u

3) Upload both the song and the playlist file to your server

4) Create a link in your page to the playlist file

Alternate Ways:

Use a Flash Player like Wimpy
http://www.wimpyplayer.com/

Check out these posts too:

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  2. Howto: Stream Your Music Online
  3. IDEA: Playlist processor
  4. Easy online image cropping application at Quick Thumbnail
  5. A couple tools to stream video from your website
  6. Where to Upload Your Files
  7. Rumor: Winamp to release a 10th anniversary edition today