It is hard to build a real conversation by simply commenting on individual photos. If this is to become a ‘community’, I think we need something more. I’m not sure what the answer is here, but some ideas:
1) Allow people to create groups, so they can discuss photography in that smaller, private group
2) Create community-wide discussion forums on different topics, e.g. everyone that wants to learn more about landscape photography or discuss their love of shadows, or a Q/A area
3) Allow photographers to create ‘posts’ that mix in with their photos, where they can write a little bit about their photography in general (almost like a blog), so you can learn a bit more about a photographer other than just their photos.
At the moment, Glass just seems a bit empty/loney and there isn’t really anything at this stage to make the app/community feel alive and sticky.