Acappella Ministries: Official website and home to Christian a cappella artists: Acappella, AVB, Keith Lancaster and Vocal Union. Features online newsletter, artist profiles and discographies, photo galleries, chat room, jukebox, mailing list and other information

acappella.com: Official site. Features group history, profiles, discography, picture gallery, chat room, radioweb and online store

Rescue: Award-winning Contemporary Christian all-vocal, a cappella male quartet. News, concert schedule, photos, discography, and MP3 song samples