I've made a concerted effort to grow some older heirloom varieties of tomatoes from seed this year. I started with 4, but after collecting some from the local seed library to help out with seed collection, and swapping some with a friend I now have 20 varieties! yikes! I've planted 14 plants in the glasshouse just last weekend, and as they get big enough, the others will go in pots outside the glasshouse.
Looking forward to seeing what I get this year ( and hoping very much for a better season than that of last year) as some of the varieties are very old ones.