Great article. I find it stifeling that businesses don't have a B2B social media strartegy, which hinders my B2B strategy. Like you said, I do it to increase Search Engine Rankings and to make my content more available.
Businesses want social media to correlate to sales, but that can't be the focus. Once they realize that it is best used as an extension of the business, sales will come from friends of engaged fans over time.