I've recently helped set up a little writing community (16 members and counting) on GooglePlus. We've been working on diving into activities such as critique circles, a writing themed blog, various prompts and assignments, word wars, joint-account collaborative stories, contests and competitions, ext. It's a great place to improve your craft and make some writing buddies. We are also very NaNoWriMo friendly!
It would be great to expand the group, so if you are interested in joining, you can message me for more details or request to join at this link --https://plus.google.com/communities/113236027301686112165
Happy writing :)