, SEO and social media strategies should be intertwined as we prepare for the inevitable social search age. I'd argue to give content strategy a mention, but they cover this point further down in the post when they write, "Above all else, create good, useful content."
Section on encouraging your social media influencers gave me food for thought.
And, I agree with "Don't rule out Bing." Bing and Google are taking two very different approaches to social search (Bing allowing you to reference social search results (or not), Google serving them up automatically.) I think it will be fascinating and perhaps surprising to see how general web users (i.e., people who don't spend all of their waking time on the web) react to the different approaches.