A computer company’s research team puts their latest video up on Facebook rather than presenting it during a technical conference. A video game developer turns to Twitter to first break the news of a new release to the masses. A salesperson stays in touch with all professional relationships — colleagues, mentors, proteges, former bosses, even friendly rivals — through LinkedIn. Welcome to business in the 21st century. The widespread acceptance of social networking sites like Facebook, Myspace and LinkedIn is changing the way individuals communicate.