Salesforce.com has introduced Salesforce CRM for Twitter, a new social media application. Twitter, for the uninitiated, is a free platform that lets people send out messages of no more than 140 characters to as broad a community as they can build. The posts, or “tweets,” as they’re known, can cover any topic area. Tweets initially were prompted by Twitter’s question, “What are you doing?” However, they have since morphed. People use Twitter to share articles, talk about their own lives, discuss industry trends — and, yes, gripe about products and services.