If you have ever vaguely wondered about google+, but never seen the point, you might want to have a look at the Fantasy Writers community. It seems busy enough and I found a few interesting posts (or whatever they are called on google+ !). I don’t normally recommend this (or Facebook much, a necessary evil in my view), but as a blogger it helps me to get more notice in google land (I believe).
Let me know of any communities you recommend!