In a story unusual even for a soap opera and believed to be a television first, ABC's "All My Children" this week will introduce a transgender character who is beginning to make the transition from a man into a woman. The character, a flamboyant rock star known as Zarf, kisses the lesbian character Bianca and much drama ensues. The storyline begins with Thursday's episode of the daytime drama. There have been a handful of post-surgical transgender characters in television shows, including a college professor in the 2001 prime-time CBS series "The Education of Max Bickford" and a model in the...