Turn Google into your own personal (free) Napster

Every now and than I go over the list of recent tips/tricks published in Lifehacker to find interesting ideas, and I found a nice Google search phrase, used to look for ftp index sites containing mp3 files:

-inurl:(htmhtmlphp) intitle:"index of" +"last modified" +"parent directory" +description +size +(wmamp3) "Nirvana"

Just substitute the term "Nirvana" for any band or singer you might be looking for.

There is also a web site doing the same thing, if you want to avoid the long search string.