Please watch this short video to get an overview of Webfinger

http://www.youtube.com/watch?v=Y26c9MNQLyc

For some more background you can read the following:

http://code.google.com/p/webfinger/

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If you have an Identi.ca account or a Google account you already have an email [like] address that you can webfinger.

This proposed task has 3 steps which you will need to sequentially 

• create an account with a service that provides Webfinger metadata
• look up your meta data at http://webfinger.org/
• explore the information that was discovered