Diane Keaton and Arnold Schwarzenegger, two names you don't often see linked, will be honored in Atlanta on Saturday night as the Stars of the Year during closing-night ceremonies for the 63rd annual convention of the National Assn. of Theater Owners. Keaton is currently starring in "Baby Boom" and Schwarzenegger in "The Running Man." Keith Barish will receive the organization's award as Producer of the Year and William Goldman, who adapted his own novel for the film "Princess Bride," was named Writer of the Year. Writer-director Blake Edwards will receive a special-achievement award.