Tagging. Using Flickr, I realise that the future is about tagging. Metadata if you will. Even metatagging: tags about tags.
Flickr uses tags to capture charactistics; to categorize images from users to make the images easier to find for other users.
Enterprise data, if it is structured, does not need tagging (maybe) because it comes complete with metadata but what about unstructured data attached to enterprise data: tagging that would make it easy to find, easy to categorize/classify and easy to measure.