I've bumped up the Tomato Problem Solver for you. The first pic definitely looks like early blight. You don't really need to study up on it much - remove the bottom leaves and put them in the trash (unless you have a very hot pile and lots of composting experience) and then spray with Daconil. Follow label directions. It works well.

As for the other pics I don't really know, but check the Solver and maybe it will help.

Pat

Thanks Pat. Do you think that Serenade would be as effective at keeping the blight at bay as daconil? I am trying to stay somewhat organic, but will compromise if it means I get to eat some tomatoes this year!

I know nothing about Serenade - I swear I'm still a newbie even though this is my 5th year gardening! Does the label indicate that it works against early blight? If so, go for it. I know that Daconil is the standard for early blight though. I've used it for powdery mildew too. Another product I have used is Neem oil (Safer brand), not for early blight but for other fungal infections on other plants. Don't know whether it might help with symptoms on your other plants...

Carolyn on the other board mentioned that she used to post here a lot and that some others who were very knowledgeable had left gardenweb. It's too bad, b/c this board really doesn't get enough attention. Don't feel bad about posting on the tomato forum. People there are very helpful and won't mind your questions.