Same size as a paperback and is built to survive in a handbag or backpack...battery life, multiple hours daily for nine days, and the battery wasn't yet half down, attributed to the E Ink display, the "as good as paper" technology everyone's been waiting
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.