Here are great resources about blogs, wikis, podcasts:

Coming of Age: An Introduction to the New World Wide Web by Terry Freedman (Ed) - This link will take you to a form to fill out to download the book - http://www.terry-freedman.org.uk/db/web2/

Into the Blogosphere - From Google: "An online, edited collection of essays which explores discursive, visual, social, and other communicative features of weblogs." - http://blog.lib.umn.edu/blogosphere/