If you're interested in some advanced Collection functionality, I invite you to check out The Ogger Club.

Some of the available features include:
♪ Create a custom View of your Collection: Choose which fields to display and in what order.
♪ Sort and search your Collection by any field.
♪ Find duplicate items in your Collection.
♪ Take your Collection management to the next level with Tags.
♪ Keep track of items you are listening to.
♪ Sort and search a list of all Artists in your Collection.
♪ Sort and search a list of all Tracks in your Collection.
♪ Check out geeky Collection statistics.
♪ Discover items that you have in common with other Ogger Club users.
♪ Allow only your friends to browse your Collection.
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I believe music should be shared, not hoarded.

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