I think you definitely should learn Go! I spent a few days using it when it first came out, and there are a lot of neat ideas that are worth learning about. I just can't think of a problem that would make me want to use it in production.
FWIW, the HN title was (incorrectly) 'Why I don't want to Learn Go'. I used that title for an unpublished first draft, but s/learn/use/ before making it public. Posterous seems to still be using the old (unpublished) title as the URL (http://arantaday.com/why-i-dont-want-to-learn-go), which is probably where the submitter got the wrong idea from.