Seedocide, but it is looking like it will not happen, after all. For the majority of the tomato seedlings, we have made it past the cotyledon stage and well into "real" leaves. For plants, this is even more significant than when baby teeth are lost and adult teeth grow in.
Over the weekend, I took the growing and leggy tomato seedlings and planted them deep. The seedlings had hit about 4 inches tall and were waving in the breeze, desperately rooted in the little spouting pellets of soil.
I collected random small containers about 6 inches tall and transplanted the seedlings ( pellets and all) so that all but the upper leaves are snug in some transplant soil. Tomatoes will gladly sprout roots from any part of their stem buried underground. This will give the plants an even stronger start.
Now all I need is for the rain to stop, so I can get them out in some real sun again.