Why bother with a list if you're going to include only sites that rarely get updated and have a limited collection and poor quality tracks? I mean, I can't believe you left rcrdlbl.com out of this! Or PayPlay, or 7digital's free downloads, come on guys, stick to energy saving PCs and Vista articles, you suck at this one.

Dear website designer,
I'm sorry you were laid off when the newspaper you worked for went out of business. Now that you are working for a website it is OK to finish an entire article on a single page. Newspapers made their readers turn to page D27 to finish an article because they hated their readers. It seems that PC World has the same problem. No doubt someone somewhere in the offices of PC World is chuckling to themselves thinking they are really clever to chop articles into tiny pieces to get more page views. You will have a great time discussing your brilliant ideas with the newspapers jerks standing next to you in the bread line at the homeless shelter.

Last.fm updates their downloads weekly.
http://www.last.fm/music/ free/

Pretty Recent Stuff too.

My favorite sites for new music is http://www.ourstage.com
Amazing free tracks from independent artists