This is a good idea for a service but I found the interface too confusing regarding how to use it, why it had to have that information, and how it worked.

Select file would seem to mean the iTunes folder? Or do I select "iTunes Music Library.xml" inside it (a large file). What personal and private information is in that file anyway? How will it be used? Where is it going? What if the xml file I have is for a different version of iTunes than the site supports? Is there a list of iTunes versions tested and supported listed somewhere on the site? What happens if a bunch of users have information in that file that they have pirated songs and the service gets a subpoena to disclose all xml files? What if I only want updates on some artists I like and not the ones I hate and regret buying their CD? Does the XML file have DRM keys in it that I will be inadvertently disclosing? If not where are those things kept anyway? How often do I get emails? How can I unsubscribe? How can I tell it to stop sending emails about a given group?

A service I would probably like would be one where I could type in names of groups I actually like and get emails when they release a new album. This may even be a complementary function to the "everything all at once without distinction" feature on the beathound site.