Recent Developments on the Internet: The common characteristic, which all these systems share, is that the approach is "bottom-up" rather than "top-down". This means that in these environments content and structure are not determined by professional, corp
Spannerworks, a search engine marketing company, has published a handy dandy guide to social media (PDF). The ebook covers the basics of blogs, podcasts, social networks, tagging, communities and Second Life.