This document summarizes several social media and networking platforms:
- Twitter allows posting of text-based messages up to 140 characters. It grew 1382% in 2009 according to Nielsen.
- Digg is a social news site where users vote on stories and share content. It can connect to Facebook to share links. There are concerns about controlling user-submitted content.
- LinkedIn is a professional networking site with over 43 million users for job searching and contacts. Connections are direct, second, or third degree based on mutual connections between users. Currently there are no marketing groups.