iTunes Genius

OK, this is ultra-geeky but I installed iTunes 8.0 yesterday. It has this new feature lamely called 'Genius' but it's so cool. Basically when you play a track that you are really getting into, you hit the 'Genius' button and it automatically generates a playlist with a similar tone / mood / type of artist. I've tried to trick it into picking dodgy selections but it mostly works brilliantly.
As a for instance, I played 'Duel' by Swervedriver and it made a playlist of BRMC, Ride, My Bloody Valentine, J&MC, Slowdive.
'Gimme Shelter' by the Stones throws up The Clash, Dylan, REM, Led Zep, Lou Reed, U2.
'Frontier Psychiatrist' by The Avalanches spat out tracks by Groove Armada, Chemical Bros, Mylo, New Order, Portishead, Air, A Guy Called Gerald.
I guess it works better the more tracks you have available to you. And there's probably some privacy concerns about how your info is collected via the iTunes store. But bugger it, it's cool!
As a for instance, I played 'Duel' by Swervedriver and it made a playlist of BRMC, Ride, My Bloody Valentine, J&MC, Slowdive.
'Gimme Shelter' by the Stones throws up The Clash, Dylan, REM, Led Zep, Lou Reed, U2.
'Frontier Psychiatrist' by The Avalanches spat out tracks by Groove Armada, Chemical Bros, Mylo, New Order, Portishead, Air, A Guy Called Gerald.
I guess it works better the more tracks you have available to you. And there's probably some privacy concerns about how your info is collected via the iTunes store. But bugger it, it's cool!