What's hot? bottom-up is the way

Since del.icio.us is here, others make use it in innovative ways.
The idea is simple: since there are a lot of people around the globe who put their bookmarks in there, you can 'easily' derive conclusions from it. What's hot and what's not, in a bottom-up way. Decided by the people, and not by the news agencies or te TV networks.
So, check out for example:
1. CollaborativeRank. Here you can see the most popular tags, and (interesting!) the most influential users on del.icio.us.
2. Stamen: vox delicii. Here you can see a visualization of popular sites as seen on del.icio.us, organized by date and popularity.