On top of that we have to categorize how we talk about music: by album, song, artist, style, etc. We can’t allow users to do bottom up categorization so we’re constantly guessing at how people want to read the site.

Things like technorati are slowly helping us do it because it puts readers in more control in describing us and the technology does some of the work in associating what we write with other things, but it all still starts with our guesses. We seem to be doing ok at it because Technorati is our second largest source of traffic behind Google.

Implicit Social Networking: Using the things that connect us to connect us. Like has happened for the last few million years. We relate through other things: music, events, mailing lists, their work, bookmarks, other people.