If you're a virtual student of the classics, head on over to the New York Time's Reading Room. This blog includes group discussions of classic literature. Here's how they describe themselves:

"In the Reading Room, editors at The New York Times Book Review lead discussions about classic books with a panel of authors, reviewers, scholars and journalists."

Users can check out the expert opinions and weigh in with comments. (The current review book is War and Peace…no walk in the park). The site is also a good example of the way an ideal online class discussion board / blog could be run.