Growing Nontoxic Food...starting with seeds

I've been spending lots of time with seed catalogues lately. Two of my favorites that I'd forgotten about til I got their catalogues in the mail are:

Southern Exposure Seed Exchange
(a worker-owned co-op selling organic heirloom seeds, and just up the road in Virginia)

and

Abundant Life Seed Company
(also 100% organic seeds, heirlooms, and wonderful, though across the country)