As noted here previously, from both the B2B vendor perspective and buyer perspective, social media is becoming an increasingly important channel for B2B communication. It's no longer just about teenagers discussing their favorite bands. Vendors are using social media to raise awareness and build market credibility, while B2B buyers are using these sites to seek out "the real story" on suppliers, products and services. With that in mind, here are four ways B2B vendors can use social media to spread their messages.