A couple things I would like to see OSSN do:
1) User has the ability to choose to view friends posts or public posts on the wall--not only admin ability.
2) Likes or comments on a users post, picture upload, profile picture change, etc send a notification to user informing them of the said comments--currently not consistent on sending out notifications.
3) Report abuse/spam/sexually explicit content capability by user to admin for reviewing of posts.
4) Reminder email to validate email account after 24 hours sent to newly registered user.
5) Pages--Ability to create pages similar Facebook (basically just a page with title, info, and a sub-wall to post comments and like things.