Any examples on how to properly credit samples on myspace, and more importantly last.fm pages? The former one could be easily done somewhere on the page, but uploading a song to last.fm and properly attribute the samples authors seems a bit trickey to me.
Last.fm is impossible but you have your own website and there is here
Actually if you upload a track to Last.fm it should have a wiki page for the track, you can actually use BB code in the wiki page for adding attribute with links. Remember, Last.fm use CC licenses so they should understand that the links are needed in the attribution as per the CC license.