Wolfram Alpha has a tool that can give you more metrics about your Facebook page then you ever knew.

http://www.wolframalpha.com/facebook/

“Wolfram|Alpha, the world’s first and only computational knowledge engine, uses its expert-level knowledge and algorithms to answer questions, generate reports, and do analysis across thousands of domains. And the newest domain is your own life and social network, as seen through your Facebook!”

Pretty cool stuff.