Tapped in has been a mainstay in education and a non threatening method of using chat to link with people around the world. This longstanding contributor to education has its 2008 Tapped In Festival scheduled for July 23 and July 24th with some neat things planned. This website has more information for you and certificates of participation will be available for those who participates.
Teachers should connect in which ever way they feel most comfortable and the power of embedded networks should never be ignored.