I've seen many Application Update managers, that tell you when there's an update for an application you have installed on your computer. Is there something similar for music albums? I have over 300 artists on my iTunes library, and I'd like to be able to see at a glance if there are any recent or upcoming releases, be it a new single, a new album or a DVD. Oh, this is wishful thinking, but assuming the is such an app, I'd like to be able to get recommendations on new groups based on the artists already in my library. Is there anything like this, be it a standalone app, a widget or an iTunes plugin?