Yeah, I was just going to suggest getting some caboose trucks. I think Athearn has some cheap ones, if you replace the wheels with metal ones and weather them they'd look fine.
A side note, I've seen what appears to be a chain drive generator attached to the outer journal boxes of one caboose truck. I think you cna get these as parts from somewhere. That, and maybe some underbelly tool boxes and such could go a long way to dressing up an otherwise plain and detail-less caboose.
Oh, don't forget radio antennas, markers, and unusual stacks as options too. Also, if you decide not to replace the handrails with wire ones, highlight them with another color like white or yellow once they are painted and -- at least from three feet away -- they'll look like they are seperate.
Did I mention I love cabooses? (I think I could model cabooses alone.)