Music update service...?

[Zazoo]

Does anyone know of a program/website that will allow you enter the name of artists you like, and then when that artist releases a new song or album, you get an e-mail notification?

It's becoming a pain to keep checking iTunes every couple of months for ALL the artists I listen to (to see if they have anything new - maybe iTunes will do this for me?). Also, a lot of the artists I listen to are from the UK and Australia, so I'm always switching between iTunes stores (since release dates differ). Lastly, not every thing I listen to is even on iTunes (I've had this problem a few times -- a band has switched labels, so iTunes doesn't carry their new stuff, and so I don't know they have a new album...)

Thanks!
Mike