Coming of Age: An Introduction to the New World Wide Web is a free e-book edited by Terry Freedman and available at http://www.terry-freedman.org.uk/db/web2/. Its aim is to present the new Web 2.0 technologies to teachers and "inspire teachers to want to try some of these "new tools" for themselves and with their classes, and then to provide practical advice and guidance on how to do so". It is a collaborative venture between fourteen people from the UK, USA, Canada and Thailand.
Great resource for educators!
A podcast version of the book is being prepared. A new chapter of the publication will be posted approximately every three weeks, along with the corresponding text of the chapter thus allowing you to read along (RSS feed is http://comingofage.podomatic.com/rss2.xml)