by Alex Hern
A slight change in angle, just so I can mention Tangerine. This is a great little app, that is perfect if, like me, you are anal about creating playlists. As is more and more common in the Mac world, it does one thing, and one thing well, analyizing the BPM of your every song your entire iTunes library. And it does it fast. They claim about 3 seconds per song, and even on my G4 PowerBook (my old G4 PowerBook), it comes pretty close to it.
The app is currently in beta, and is free while it is.