"50 Social Sites That Every Business Needs a Presence on"

"50 Social Sites That Every Business Needs a Presence on"

This list from "Inside CRM" is divided into 5 categories:

Social-Media/Social-Bookmarking Sites (e.g., Reddit, Digg, Del.icio.us);
Professional-Networking Sites (e.g., LinkedIn, Facebook);
Niche Social-Media Sites (e.g., Mixx, Tweako);
General Social-Media Sites (e.g., Wikipedia, Newsvine, Yahoo!Answers); and
Job Sites (e.g., Monster, CareerBuilder.com, CollegeRecruiter.com)

Participating in all of these social sites would keep any business very busy...