I was/am having the same problem with weeds taking over. I have 80 something tomato plants, I was planning on about 100 but the weeds were taking up so much of my time it was ridiculous.
What I resorted to doing was laying down newspaper, 2 sheets thick and then about 2" of straw on top of that, dried out grass clippings work great also. Depending on your area hay or straw may be easy to come by, here it was a bit of a hassle for me to find but eventually I got some and now the only weeds I need to worry about are the ones I haven't covered yet, but the covered parts all I have to do now is walk through and care for my plants and not worry about weeds.
KSUDS-I do have a question about one of my plants.
I have a row of black from Tula tomatoes and they are growing pretty good, one plant on the end of the row started curling its leaves in, now the plant is a bit darker green than the others, most of the leaves have curled in and it has that slight "gold dust" color on some of the leaves.
Wasn't able to find out exactly what the problem is. Other plants next to it look like they should but I wanted to see if you knew what was wrong with the one plant.