How does it work?
The Hype Machine tracks a variety of MP3 blogs. If a post contains MP3 links, it adds those links to its database and displays them on the front page.
Some of the frequently accessed tracks are cached by the Hype Machine server, much like Google Search caches web pages, to reduce load on the bloggers' servers and protect their bandwidth. Those tracks are NOT available for download, but you can preview them via the "listen" links that are next to each track or using your media player.