There are 10 Google+ communities that I either started and am admin for and another two that I've been asked to moderate. Google+ is a great showcase for images, comments, discussions and links. Some of the groups have healthy membership numbers and lots of pictures. Some don't. I'm including the list below. Let's see those pictures, read those comments and follow those links. And if you want to promote your own site / blog then that's fine with me.
The soundimageplus blog has been going since 2007 and to date has over 12 million page views. Written by David Taylor-Hughes, a professional stock photographer, it includes photographic articles dealing with a wide range of themes including film and digital photography.