PFLAG = Parents, Families and Friends of Lesbians and Gays. PFLAG's stated mission:
Promotes the health and well-being of gay, lesbian, bisexual and transgender persons, their families and friends through: support, to cope with an adverse society; education, to enlighten an ill-informed public; and advocacy, to end discrimination and to secure equal civil rights.
Read a profile of PFLAG -- by Kathy Belge (About.com: Lesbian Life).