This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread 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.