I discovered a wonderful way to rip free music from Myspace.com, or really, any file from any website. Just copy the link for the page with the desired file and go to File2HD.com. Paste the url, agree to the terms of service, click on "get files", then right click any file you'd like and select "Save Link As"
There are several websites that conveniently extract audio from youtube, such as listentoyoutube.com or VidtoMp3.com, but if you're just looking for music, I recommend trying to find it on Myspace first and using File2hd. The sound quality is orders of magnitude better.