This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
I would especially recommend using Go for projects for which the language and its extensive standard library are sufficient out of the box. For other projects I would decide case by case, but would prefer Go to any other compiled language.
I don't know about large production environments using Go besides Google and the Google App Engine. There are many smaller organizations using it for production code though.