First frost this morning! It's probably only enough to kill the basil and not much else, but there is a definite sheen of icy crystals on the grass.
UPDATE:
I was wrong! The basil, okra, sweet potatoes, peppers, eggplant, and tomatoes are all done for the year. The s.o. has gathered the remaining green tomatoes, and I'm planning to go dig all the sweet potatoes that are still in the ground.
It's strange how different every gardening season is. Last year, you may remember, we were fighting the first frosts tooth and nail, covering tomato plants with sheets, etc. This year we (and our garden) are ready for the change. Onward and winterward.