This year, Cam and I are trying to grow more heirloom varieties of plants, so that we can save the seeds for next season. Almost all of our tomato varieties are heirlooms.
Last year, we planted the majority of our tomatoes in box # 1, but this year, they are growing in box # 3. I think they can succumb to certain diseases if in the same spot year after year. We'll see how this box does.
We are growing about ten Tula tomatoes and five cherry/grape tomatoes in one box. They're planted on opposite side of the box with herbs and mints in between.
So far, they seem to be weathering OK, considering the chilly weather and many, many rainy days we've had.

You can see the old owl in the background. He did little to ward off the birds last year... but I think he's a cute decoration so he'll get to stay in the garden. I'm probably overusing bird netting this year, but I guess it's better to be safe than sorry.
As you can see, the tomatoes are still very little. We planted the seeds in one of those seed-starter kits you buy at Lowe's or Home Depot. When the seedlings were ready, we planted them in the box. We lost several to cutworms, and the straw method seems to work... We haven't seen any cutworms since.

For those interested, Black from Tula Tomatoes are a dark reddish black tomato with a rich flavor from Russia. Apparently, they are very delicious. Heirloom and organic. Cam is very excited about them. I'm more excited about the cherry/grape tomatoes, since those tend to produce faster and I don't have to wait as long to harvest them. (I am very impatient person!)
I bought our seeds from Seed Savers Exchange:
http://www.seedsavers.org/Details.aspx?itemNo=251