Nebul.us Can Visualize Your Online Activity
via infosthetics.com
"After installing a browser plugin, the service will start monitoring the browsing history. Typical Web2.0 profiles like Facebook, Twitter, last.fm or YouTube can be added as well to complete the view of online activities (note that the initial setting is set to 'private', and information about visits to individual sites can also be shared with 'friends' or blocked)."
