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More metrics.  Sounds like an interesting index.

Interesting set of success factors.

Nice tips.

"Brands and political campaigns must reach people where they engage online. Rather than interrupt people, invite them to a conversation or engage with the message when it's convenient and beneficial for them. "

This coming election will see the use of fully-formed social media campaigns for the first time ever. People will be wary of the sources posting the content though.

It pays to know your audience and to map the engagement path. If your target audience is older, a 'Like' may be a lower value engagement metric than you thought.

Interesting to see how google+ will evolve.  If brands can't get involved, I wonder what the effect will be on growth.

INteresting stats on Twitter usage and behavior twitter