Searching for music files? Check out Woonz.com.

Woonz is basically a search engine, specifically for searching audio files for download. You can search by artist, band name or track name, if it is music you are searching, or you could search for any audio file using keywords. No files are cached or stored on Woonz servers, all data comes from various sources on the internet.

However, there is an interesting warning on the homepage which reads:
Do not download copyrighted material without permission. Woonz is a search engine designed for LEGAL entertainment purposes only. This search engine is in no way intended for illegal downloads.

But the fact is that once you search for a particular music file and click on the download button, what you get is a redirect page and then the file starts to download. You have no idea from where the file is being downloaded. So there is not much to let the user know whether the download is legitimate or not unless of course he/she is already aware that the file he/she is trying to download could be copyrighted.