For example, real simple syndication (RSS), a blog, email marketing, including an email newsletter (ezine), a text (SMS), and Twitter are channel tools, through which businesses serve their customer communities.

FORBES: Social Media Builds Customer Communities

While some may argue that RSS feeds (for Real Simple Syndication) have fallen from common usage in the social media era, how would Google explain the huge, instantaneous response on Twitter from Google Reader users?

FORBES: Google's Strange Attack On Bloggers And The Public Internet: The Massive Reaction To Reader Shutdown