For a while I have been thinking of different ways of supporting finding information with tags that go beyond tag-clouds. There are three trends that are worth pointing out.
Faceted Browsing Metaphor The first is faceted browse interfaces. A good example of such an interface is wine.com. You can start browsing by picking any of the facets (price, region, type). For example, you might start by looking at wines from a particular region. Next, you decide to view by price. If you don’t like that option, you can change the facet, and start looking by type. You are in control every step of the way. In many ways, this could be the holy grail for tagging systems.
The metaphor that comes to mind for faceted browse is that of driving a car. You are in control, you decide when to turn right, or when to turn left, when to stop.