Amazon has launched a page where they're offering 200 different music tracks, all in MP3 format, for free download. And it's not music from completely obscure artists either: Moby, Aimee Mann, Beck, The Strokes, Alison Krauss, and more. Bit rate varies - I've seen 192 kbps and 128 kbps so far. I think they underestimated the popularity of this: it took almost 60 seconds for the download to start. Once it started, however, I was downloading at 400 KB/s. Grab 'em while you can!