Reading around classmatess blogs is interesting and often informative, giving insight into new ideas and ways of looking at things. Keith's blog has some good posts, some long and informative, others short and to the point. He uses links to help point out ideas occasionally, which is a useful thing.
Another blog that seems to be pretty good is David's. He uses pictures quite well to emphasize posts and has longer posts with some potentially interesting ideas for topics on which to blog.
Please don't be offended if I did not mention any particular blog, as all of them seem fairly decent, these are just two that I have chosen to highlight.