Where do you go?

Sometimes I really enjoy using Foursquare, and sometimes I think I'm spending too much time tracking my whereabouts in the city.
In the end, I think what makes the program fun and useful for me is the living record it provides of the past few months that I've seriously participated in the "game". Sites like Where Do You Go make really cool use of Foursquare's API to show me where I've spent my time in the city.