317332 Stream of posts with Exp Engin

I'd like to create a page on my Expression Engine site which has a 'stream of posts' very similar to the new main page of Facebook. I've included a snapshot of that page in the attached file. It should be integrated with my Expression Engine site. That just means that any person who is signed into the site (which means they must already be a member) can very easily post something or respond to someone's posts. All these posts show up on a single page, chronologically by new posts (with responses to the posts immediately below the main posts), and with thumbnail photos of the members to the left of the post or response. Let me know if you have any questions, or if that's clear. The site is www.peopleinneed.info.