vegetablarians:
Vegan Represent: a vegan forum
GoVegan.net's message board: a veggie forum

pets:
IGPost.com: an Italian Greyhound forum
IggyPlanet: an Italian Greyhound forum
Diavolino Italian Greyhounds: Mouse's breeder's site
Pets Calgary: a yahoo group for Calgary pet lovers

cancer:
Ovarian Cancer Canada
National Ovarian Cancer Association
Association of Cancer Online Resources