Creeping Thyme dead? I planted five of these plants from a flat, and
now none of them look good. I watered once when planted, then held off
from watering because we have had a wet couple of weeks. One is
completely brown. Is there any hope for these, will they come back or
should I cut my losses and plant something new?

I know this comment is a bit late, but it may help you out the next time.  

It sounds like they might have been rootbound when you planted them. 
If so, the watering did little good as the water just passed around
the clump of roots and none was absorbed by the plant.  Next time make
sure to loosen or 'fluff out' the roots a bit before planting and if
they're really dry soak them in a shallow container of water for a few
minutes before popping them in the ground.  If they turn brown again
try pruning them - take off most of the dead growth but be sure to
leave a couple of inches of stem at the base.

Good luck!