4AD: Lisa Gerrard
Profile and discography from her record company.
Eyesore: Lisa Gerrard
Discography with cover images of her solo work.
Eyesore: Lisa Gerrard and Pieter Bourke
Discography with images of their work as a duo.
Lisa Gerrard: Duality
Her official site contains information on all of her projects. Includes sound files (some exclusive), discography, photos, history, and reviews.