I cant wait!
But I will...
I wont touch any major version, of any software I rely on, from any company, at first release. Mass public release is always a far bigger test than any prior test could be. I want the benefit of those fixes! Or at least, to feel safe that none are needed. iTunes 11 looks terrific but I will leave it to the guinea pigs for at least 2 weeks.
I didnt fully appreciate iTunes 11 from pictures, until I watched the keynote: its simple to use (as it should be, finally) but not dumbed down! The power I need is still there.