I didn’t think that second batch of strawberry plants looked terribly healthy when they arrived from Park Seeds.

All except one tiny clinging-to-life hopeful have succumbed. I’m going to clean out the strawberry pot, transplant the one survivor to the hanging basket with the others, and move on. Strawberries next year.
The other Learning Experience hasn’t resolved itself yet. The Early Girl tomato plant, the one with the four tomatoes on it:

A day or two after I posted that photo, I went out to water and found aphids, whiteflies, and about 1.72 million baby spiders crawling all over the plant. I checked with the folks at Dave’s Gardening Forums, who suggested a dilute spray of hydrogen peroxide, dishwashing soap, and neem oil. I found the neem oil at a locally-owned nursery company which doesn’t have a website, mixed up the stuff, and sprayed the tomato, both front and back of each leaf, as directed.
The next morning all the bugs were dead or dying. Hooray!
Three days later, so were a bunch of leaves:

The tomatoes still look okay, and there is new green growth on the top of the plant, so I didn’t kill it. It seemed to be mostly the lower branches and the most saturated leaves that turned yellow and brown. I assumed that was because the spray probably dripped down and collected on the lower branches, while the upper ones drained off fairly quickly.
But this morning I was doing some more research, and those wounded leaves look an awful lot like leaves from plants afflicted with bacterial speck, a seed-borne disease. I also read that Bonnie Plant Farm, the producer of this seedling, ended up having to take back several hundred thousand pepper plants this year because of diseased seed stock. Peppers and tomatoes are very closely related and often share bacterial and fungal diseases when planted in the same soil without rotation.
So I wonder. I will continue to watch. If the neem oil was the culprit, the new foliage won’t be affected and the tomatoes will be fine. If the plant does have bacterial speck, it will show up on the fruit and the new leaves will start to show symptoms as well.
Either way, next spring I will either grow my own from seeds or buy transplants from The Tasteful Garden. Their plants are amazingly healthy, and I can’t wait for the Carmellos I planted last week to start bearing.