It would be nice if sites like Amazon gave us more than a 30 second snippet from a song...often you can't really get a sense of the music from such a small segment. I often use Youtube to find out more from different artists before I buy something.
Guy at work turned me on to this service (stream-only, no downloading, but it solves your 30-second clip issue), which seems pretty good, but after reading the terms of service, it's very clear you should NEVER upload ANYTHING to it. It basically says anything you upload, they're allowed to irrevocably use and/or sub-license at no cost to them and if royalties or anything need be paid to 3rd parties as a result, you're on the hook for that. Great for listening. You can make playlists, and if you go to individual track info, they'll recommend things you may not have heard before. Anywho, here's the link:
http://grooveshark.com
