Update

I now have 5 tomato seedlings standing about an inch high, and 3 zucchini seedlings just barely poking out of the soil.  The lettuce is growing right along.  The main carrot pots look fine and more than ready to be thinned.  

The transplanted carrots look like hell, though.  

I have been playing with the idea of NOT thinning all the carrot pots.  You know, just to see what happens.  Will I end up with a bunch of small carrots?  Will they just not grow?  Stay tuned.