Lisa Branon, the Librarian at Frostwood experimented with Skype last year. Her students reaped the benefits as they enjoyed some author Skyped visits. I see from reading the blog entry that there's a web site of Skype friendly authors.
Last year a couple of students talked me into doing a book club - we kept it small and meet every 6 days or so. All of us really enjoyed it -and since the students will be in 5th grade next year I suspect we'll keep it up. II'll start by letting them explore this site and select an author who is willing to Skype. None of the names jumped out at me, but it will be fun to discover a "new to us" author.
It will keep my first school Skype experience small and I'll have the pleasure of working with students who are articulate and adore technology.