Web service Extispicious maps out Delicious bookmark tags by frequency for a user.
Bookmark-sharing service Delicious lets you "tag" bookmarks with keywords. Over time, a user tags bookmarks with certain words more often than others. Extispicious displays a user's tags in a pretty size-based chart - so pretty a few Delicious users are showing off their Extispicious chart on photo-sharing service Flickr.
Say that 3 times fast.
extisp.icio.us [Kevan.org]
Extispicious Group Photo Pool [Flickr]
Related:
A beginner's guide to del.icio.us social bookmarks