Best student blog:
I've decided to nominate Martine's blog as the best student blog. The layout is nice, and she has written a lot of interesting and useful articles for students.
Best group blog: Voices From The Learning Revolution http://plpnetwork.com/category/voices/page/2/
Best Teacher blog:
This is my teacher's blog. She writes useful posts about how you can have good presentations in class, and often she will include interesting links and videos in her posts.