Not what I had in mind--mp3 aggregators

So, I have encountered a great many number of websites that host mp3s. However, these mp3s look to be of dubious legality. They all come with disclaimers saying something like "we will only host these mp3s for sampling purposes only--please buy legal CDs". I'm surprised by this, in part because of the draconian way the RIAA goes after p2p-file traders, and also, how come I didn't know about this earlier?

Rather than link to each and everyone individually, I found a couple mp3 blog aggregators (okay so I did link to a bunch):
http://hype.non-standard.net/
http://elbo.ws/
http://tofuhaus.antville.org/topics/music
http://www.ecbrown.org/linkpage.htm

I also want to point out that http://tofuhut.blogspot.com/ has an amazing list of links for these kind of things.