I am currently building something where you can post once per day. If you want to post again within the 24 hour window, the prior post gets replaced with the new one and it also shows at the old post's timestamp in the chronological feed.

As for connecting to people, you drag and drop the connect button into a folder name which you want their posts to show in. For example, You can create custom folders for friends, family, coworkers etc. After that, you drag the connect button into that folder. And each folder creates a custom feed from only those people for you.

I am open to brainstorming more ideas.