The craft that visited Vesta is due to reach Ceres in march. They took a picture that isn't quite as good as the Hubble's but we can expect it to get much better very soon. This mission is really amazing. One day Ceres may become someone's home.
Apparently a fiction story written in 1981 includes my idea for inverted highways (due to low gravity and speed that isn't very high.) Mine were underground. Don't know about theirs.