Andy Wingo sends its comments from identi.ca to twitter because he thinks that it may be useful. In fact, I follow him there. In my opinion this is something quite similar. I know many people disagree with google+, but for example Gtk+ has just opened and many people have joined.
I am a newbie, but in Google+ I would write SICP's exercises I'm going to do. Here not just because no one else does that, it doesn't seem the right place. In my opinion GNU guile should use such accounts for greater mass of users. I will not delete account, but if Andy Wingo or Ludovic Courtès say explicitly that they do not agree with the use of that name I'll change it for "GNU Guile (not official)". But I think it would be ridiculous, it's evident that it isn't official.
