Map of what I've in mind when surfing the web Click on words to see my bookmarks.
Map of the rest of the world likes: l'air du temps (Zeitgast)

Idea: create a map from the collection of bookmarks of users
Content: bookmarks in del.icio.us.
Form: a map generated after the collection of bookmarks.
You can litterally MAP YOUR MIND, know what people are thinking about.
Tools to use with del.icio.us
Read also this article by Robin Good Personal Knowledge Mapping And The Concept Of Data Emergence
http://blackbeltjones.typepad.com/work/2004/07/my_delicious_ta.html