Yes I know my Google Profile is publicly available, however that doesn't sound like it is the interesting part. The interesting part is the data that he was able to get surrounding that. What does his data show regarding the 6 degrees of separation? Stuff like that.
https://profiles.google.com/u/0/<username>/
All of your Google Data is laid out on the dashboard for your viewing and deleting pleasure:
http://www.google.com/dashboard