Earlier this week (wednesday) I found a link to a music related web site, but I didn't bookmark it (yeah, I'll never forget the URL to this site) and now, you guessed it, I can't remember what it was. On the site, you create a free login, and then have the option to upload an exported XML file of your iTunes library. Then it does some referencing and shows you other users who have the same artists you have, and I believe it allows you to see their library list. It looked like a good way to stumble upon some new music that I don't have and quite likely find some artists I don't even know about.
I know this is kinda vague, but if you have any idea, your time is appreciated.
TIA