Trying to change the way we buy music, the Record Store opens today in San Francisco. Their inventory is simple: a single CD, sold for $5. There’s no label, no track listing, no notion of what’s on it. The tracks are picked from a wide variety of genres from anywhere in the world. Each CD comes numbered, and you can visit their website, key in the number, and discover (a little at a time, spread over a couple weeks) more about what you’re listening to. They plan on cutting five CDs a month. No word yet if they’ll mail these things out.