Facebook Lexicon - What's being discussed on Facebook

Facebook Lexicon let's you see what words are being used by users on Facebook Wall. Similar in functionality to Google Trends and Technorati, Facebook Lexicon allows you to tap into what's generating the buzz. Facebook blog gives some hints on how the occurrences are calculated:

“How are these numbers calculated? We have a cluster of computers that count the number of occurrences of every term (for example, "juno") across profile, group and event Walls every day. The system strips out all personally identifiable information so that there is no way to track a mention back to a specific person. No human at Facebook ever reads these Wall posts, and Lexicon does not look at personal messages, invitations, or any other private user-to-user communications.”
Overall, a nice utility by Facebook. However, one thing that sucks is the lack of embed options, i.e. you cannot post the charts on an external website.