Apple's iTunes Genius, is Genius!

Ok, there hasn't been many new features of iTunes that have really wow'ed me, but the new Genius feature, WOW!  

I've always loved Last.FM and their recommendation radio for similiar artists, but having this integrated right into iTunes is awesome! 

Just pick a song you like, click the Genius button and playlist of similar artists and songs is automatically generated for you, and its bang on. 

For example, I select a Burial track and the Genius playlist includes songs by Loscil, Stars of the Lid, Cinematic Orchestra, Lamb, Apparat, Amon Tobin, Nightmares on Wax, Trentemoller and The Knife, very nice!