Official sites:

Xenia Seeberg
Eva Habermann
Brian Downey message board
Michael-McManus.com
Patricia Zentilli
Nigel Bennett
Ellen Dubin
Louise Wischermann
Rolf Kanies

Episode guides:

Lexx at TV.com

Discussion forums:

Lexxverse.com

Fan Sites:

LexxZone
Grand Fortuna's League of 20,000 Planets