Craft Forum/Community options Im curious to hear more about what any of you are using to build "community"/ "forum" messaging options into your craft cms site.

From what I've found it seems there would be a couple of interesting options

Socialize Plugin https://dukt.net/craft/socialize

Its in private beta and I haven't tried it but it seems to have a lot of the features we would need.  

The big option questions would be how to manage any group messaging features but maybe you just have a "posts" channel that users can post to?

Muut https://muut.com/

Allows for an iframe type integration. Seems to be pretty full featured but wouldnt really share any data (or logins) with craft, would be a visual integration only

Any other options

We aren't looking for a ton of features, just a way for people to login, share text and photos, and comment on those posts.

Curious if anyone out there has tackled a problem like this?
Out side of what you have mentioned, I recall Discourse being mentioned on the Google+ Community. That's written in Ruby, though.

Vanilla Forums is open-source and written in PHP. It's also comes with SSO (Single-Sign On), and can be embedded into another site via an iframe.

There are currently no announced forum plugins native to Craft.