Salt Spring Seeds - Heritage & Heirloom Organic Seeds. Very good selection of all kinds of seed.
Seeds of Diversity Canada - There Library has a large number of Canadian seed suppliers. A grassroots seed exchange with lots on seeds, history to gardening. A great seedy site.
Elite Farmer - Aims to disseminate information of use to people with small farms or rural property.
Vaults of Erowid - Medicinal and physchoactive properties of plants