Hello, so far I really like your plugin, but I noticed a couple issues.
First; uploaded photos do not show up in the main activity stream. you can still see photos uploaded when you go to a users profile, but you won't see them when you are checking your newsfeed.
Second; some compatibility for the BuddyPress Activity Privacy plugin would be awesome. As of right now, it acts as if the photo is a group post (to which group, I have no idea) but it does not give me the options to make it public or viewable by friends, only the group options (which are post to group members, or group admins). Even when i add the ability to make group posts public, it still isn't viewable on the newsfeed.
Besides for that, awesome plugin. Keep up the good work!