Hi everyone!  This is truly the happiest day of my life!
My Antonio, a semi-feral foster that I adopted, had gotten out a little over
a month ago.  There had been no sign of him until two days ago, when my
neighbors spotted him near our condo's tennis courts. I had to stop setting
the traps last week, as it's gotten below freezing here at night.  Luckily,
my order for Fosters and Smith had arrived that day, complete with the
microwaveable warming discs, so I was all set to start setting traps again.
I felt very encouraged that I at least wasn't setting the traps blind now, I
had a general area that he was in.  So I set two traps over there, and in
just two nights, I caught him!!
This morning he was in one of the traps.  Of course, he was very freaked
out.  We went back to the house and he's in the bathroom right now until his
vet appt later today.  He's been meowing up a storm, which is odd.  I've
never heard him meow except for that little feral meow he would give me when
he wants food.  He looks fine, and I feel bad keeping him in the bathroom
for now, but I know if I let him out, I'll never get him in the carrier to
go to the vet.
I'm so happy!!  I was starting to think I would never see Antonio again!
Thank you all, especially Megan and Phil for the trapping advice.