Should tomatoes be stored in the fridge?
From the great Harold McGee, they may last longer in the fridge, but they will taste like cardboard:


  Tomatoes came originally from a warm
  climate, and should be stored at room
  temperature. Their fresh flavor
  readily suffers from refrigeration.
  Tomatoes at the mature-green stage are
  especially sensitive to chilling at
  temperatures below about 55°F/13°C,
  and suffer damage to their membranes
  that results in minimal flavor
  development, blotchy coloration, and a
  soft, mealy texture when they're
  brought back to room temperature.


Excerpted from "On Food And Cooking", by Harold McGee