Maybe I am biased, but I am pleasantly surprised by Wikipedia recently. There is a lot of material coming, at least on the subjects that interest me (I don’t know, reading about coffee, tea, scientology, estimation theory, neural networks, anything). An interesting side effect is that I don’t buy books anymore on subjects I can read about on wikipedia.
Another thing that caught me by surprise – I rediscovered the pleasure to learn. Now I can go and learn about all these math theories that I skipped in college (because I was always busy typing on those Unix boxes).