Here are some other helpful links:
The Internet Movie Database - Find out what your favorite star has been in.
Alt.collecting.autographs - The autograph collecting newsgroup.
Autograph Collector's Database
Autograph Central
The Star Archive - Your guide to celebrity addresses!
Hans' Autograph Page
Nicole's Autograph Page
AutographiX - Liran's autograph collecting world
Movieman's Autograph Page
MIKE'S AUTOGRAPH HOUSE
Mark's Autograph Page
Home of Celebrity Addresses
The X A Page Dedicated To Autograph Collecting
Riku's Autograph Collection