I just found out about this Firefox extension by Ted Rheingold of Dogster Fame called who is that person.
I posted my first Firefox extension. It’s called ‘Whois This Person’ and it’s a simple little right-click menu item which will query any name you’ve highlighted against LinkedIn, Wikipedia, Technorati, GoogleNews, Yahoo Person Search, TailRank as well as some family and address sites. It’s not gonna change the world, but it may save some seconds here and there.