Bonjour has been described as "no-pain networking". If you've ever used iTunes and seen shared libraries popping up without having to configure anything, then you'll know that it really is painless. That's not to say that it's perfect. If you see someone's sharing their music, how do you see if they're also sharing photos with iPhoto?
Unlike existing browsers, which group by service, Flame groups by the machine they're on. This means that you can see the links between services; "Tom's Music" is being shared by the iChat user "Tom", who also has an iPhoto library, "My Holiday Snaps", and a Web server. No need to wonder who's doing what any more.
Flame's still a little immature, but we think it's useful.