I just started watching the Clone Wars series recently, once Netflix instant picked it up. I’m still in the middle of season one, but so far, it’s fantastic. Because George Lucas had nothing to do with it, the writing is great, and it “feels” Star Wars-y, even if it’s set in a time when Y-wings are the hot new thing.
J.M. Stevenson says what I’m thinking (though I will say that I do like the first season, which makes me all the happier about anticipating season 2) and points out that you’d probably be better off just watching the series than the (generally bad) prequels.