A co-worker literally handed this updated white paper to me last week. Trevor Cook and Lee Hopkins, Australian new media and PR gurus, updated their Social Media or "How I learned to stop worrying and love communication" primer to include new developments like Second Life, Twitter and Facebook.

It's a great piece that takes out the fear and intimidation that many outside of this field encounter, but still explains the logic behind each technologly and weighs the pros and cons.