DaytrotterOkay, this is pretty fantastic.
Daytrotter is a music studio, basically. Musicians come in and perform four songs live at a studio in Rock Island, Illinois, and the songs are put on the website. Five bands, twenty songs a week, and I've never of heard of any of them. Mostly.
Everything is free, and you can download any of the songs. The site is also well-designed and easy to navigate, and there are archives back to June 2006.
It's great. It's great to hear people performing live, it's great to discover new music, and I look forward to the new band each day.