Here are some useful sites, where you can look up zip codes, find descriptions and addresses for network TV shows, and other useful stuff.
USPS ZIP Code Lookup and Address Information
Google Groups - search the posts in the alt.collecting.autographs Usenet newsgroup for celebrity address information.
Search the Internet Movie Database for information on television programs and movies in which your favorite celebrity has appeared.
Dead People Server See if a celebrity has died or is still alive. Useful for searching for movie and television personalities that are no longer in the limelight.
Baseball-Reference Search the Baseball Encyclopedia of Major League Baseball players to see career stats for any former or current baseball player.
CBS.COM
NBC.COM
ABC.com
FOX.com
The WB Network
HBO