If you want to use a SHOUTcast stream:
Link directly to the stream without using a .pls or .asx file. If you currently have a .pls or .asx, you can open it in a text editor to get the direct link to the stream.
Once you have the direct link to the stream, make sure it has a .mp3 extension by adding ";nop.mp3" at the end. If the SHOUTcast URL is:
http://22.214.171.124:8085/ (this is the Little Radio URL)
Make a link which looks like this:
<a href="http://126.96.36.199:8085/liveMaxima.mp3?1366585618668.mp3">LISTEN TO LITTLE RADIO</a>
Note foo.mp3 doesn’t really exist. It’s just a NOP.
This info is from Ian Rogers' SHOUTcast with Yahoo! Media Player blog entry. See that page for more details.
If you want to include the current SHOUTcast stream title in a web page, you can use this PHP script in an IFRAME, or similar.