extisp.icio.us
Originally uploaded by blind sam.

Extisp.icio.us is a web-app which creates a visual layout of a user's del.icio.us tags. The links are active, and take the viewer to the list of that particular tag, and hovering on the title reveals the number of links. Mine at the moment is quite poor, I have less than a hundred tags, but I haven't bookmarked anything locally on a browser since I created (and started using) the account.

That said, there are lots of other people who are more familiar with this than me. (This person is very focused isn't he?)