Supersmart Ged (who I know from Yahoo!) pointed me to the longtail recommendations engine on last.fm. I’d been to the page but I’d never noticed the slider: have a play, it’s really good (you might need to be a user to access it). It’s a really good and simple way to demonstrate in real terms the notion of ‘long tail’ to someone who hasn’t ever seen it before.
And on the topic of all things with long tails, Chris Anderson‘s book about it is on pre-order at Amazon now.
Actually i am not an active serfer, but this this site is really great, i will spread it through my friends.