Came across this new software which also has a social-networking counterpart:
Slife is a new application for the Mac OS X that lets you visualize and organize your computer activities like never before. Slife observes your every interaction with applications such as Safari, Mail and iChat and keeps tracks of all web pages you visit, emails you read, documents you write and much more.
Slifeshare is a brand new site where you can share your Slife activities such as browsing the web and listening to music with your friends, family or anyone you care about. It is a whole new way of connecting and staying in touch.
Interesting idea, though I’m not sure how comfortable I’d be knowing that others can easily track whatever I’m doing on my computer!