I was surprised as well to see them still around. I'm going to be on two 737-200's tomorrow afternoon. I will have to remember to take a picture because it might be my last ride on a 737-200.
I still remember my last flight on a Delta 727 (last 727 at all) -- DFW to CVG in January 2003. I think it was only a month before the 727 was retired by Delta.