on myspace one can find many nice songs. in most cases you can not download them to your harddisk, just listen to them.
the songs are beign streamed in mp3 fileformat by the flash player on the myspace site.
yesterday i wrote a little tool which downloads all songs from a myspace artists site.
how this works:

1. get firebug (which you should already have, cause its the best firefox plugin evarrrr)
2. open a myspace site with songs you like
3. open firebug (F12) / select: “Net” (second line) and “All” (upper line)
4. wait till the music is playing
5. scroll down the list
6. search for an url like:
http://mediaservices.myspace.com/services/media/musicplayerxml.ashx?b=999999
7. right click on that url: “Copy Location”
8. open new window, open the copied url
9. you see an nice structured xml file, there are “durl” elements, which contain a link to .mp3 files. here you are.

all files are prepared for streaming - compressed as 96kbit 22500 Hz files, so its propably not the quality you expect.