Here’s a novel idea I found while using Stumbleupon. (In case you don’t know, SU walks you through a series of websites according to topics of interest you have previously chosen. It also learns what you like as you go along. You find websites that you probably wouldn’t have otherwise found in a hundred years.)
In this case, the site I stumbled onto is called Glyn Hughes’ Squashed Philosophers. If you’ve ever wondered what Plato or Nietzche are all about, this gives you a good overview. In the case of Plato, for instance Glyn Hughes condenses Plato’s Republic down from about 130,000 words to about 15,000. That’s still a substantial read, but it’s a lot easier going than the original.