Mmm. . . not sure what you want this to be. I have some mp3s of my own music up on my website, ispeakmusic.com. It's hosted on the .mac site, now called "mobileme." I used Apple's iWeb software to put the site together, and it's workable. There are many alternatives.
One piece of advice I'd give, though, is to beware of rights issues--digital rights are subject to legal protections (albeit rapidly evolving ones.) If you aren't sure you have rights to a given file, don't put it online.