I feel for you. It looks like they've suffered some pretty bad root rot and (possibly) collar rot. I'd pull one or two up to see exactly where they rotted. If it's only the roots, they may come back. If its the stem, I would cut them above the rot line and attempt to re-root the plant buried up to the first or second leaf node in some warm & moist potting soil out of direct sunlight. Gallon pots would work for that purpose. That would be quite time consuming but it's worth a try.

When you say their feet were in water for a week, do you mean the soil was wet, or that there was actually standing water?

This post was edited by Slimy_Okra on Sun, Jun 23, 13 at 19:26

Thanks for the input. I'll take a closer look at them today. There was actual ponded water in my garden for a few days but it was off to the left side of the picture, where the tomato plants are. The rest of the garden was waterlogged for close to 2 weeks. When it finally dried out, the soil became like a rock.
I've tilled it a couple of times. It's actually pretty dry now. When I planted these eggplants, they were the best I ever had. The plants were about 1' tall with thick stems, lush leaves and the roots were breaking through the peat pots. I'll check the roots in a little while. I wonder if it would help if I moved each plant about 1' from where they stand now so they won't be sitting right in the rot plus mix some more compost in each hole. I'll try anything.