My own humble digital music collection contains roughly 15,000 songs at the moment. The larger it gets the harder it is to browse through, and if I don't remember the name of an artist or song, I tend to forget I even own the music. Browsing trough my own music collection can be quite surprising. But I don't like using the old iTunes interface. Could it be a bit more intuitive?
Carles F. Julià explores this area with his research project SongExplorer: a tabletop system for exploring musical collections. It presents the user with a 'galaxy of songs'. By touching the table in an iPhone-like manner you can browse through the collection, create and manipulate play lists, and discover relationships between songs.
I'm very interested in new ways of organizing information. I think there still is a lot to be improved in this area, even in the organization of regular files on your computer. I tried tagging my files for some time, but still didn't find a satisfying workflow. I definitely think throwing everything in one big 'box' and using some search functionality and meta-data to find things is the way to go.