Since 1975, Seed Savers Exchange members have passed on approximately one million samples of rare garden seeds to other gardeners. We are a non-profit organization of gardeners dedicated to saving and sharing heirloom seeds.
So bascially its some people who were so dedicated to not losing our country's old, regional, heirloom varities of vegetables (and fruits, herbs and flowers) that they rounded up these seeds from home gardners and now offer the seeds for sale on their website.
They've got great pictures and descriptions of all the different types. Although in some cases the names alone would be enough to convince me. After all, who could resist an Aunt Rubie's German Green Tomato, or a Sweet Mountain Yellow Watermelon?
I already ordered a full catalog from the website, and I am predicting now that I'll be recieving lots of seed packets from Seed Savers in early spring for next year's garden.