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Alexi Douvas and Michael Wyszomierski of Google, with a special guest appearance by Matt Cutts just published a helpdesk Google+ Hangout on YouTube on the topic of SEO and Webmaster Academy.
Here is the video:
I watched about half of it and it is pretty basic but it promises to get into some tips, tricks, and information about the Knowledge Graph. Although I didn't get to that part.
Forum discussion at Google+.
