Sounds remarkably like blogging functionality. Manaaki appears to be a WordPress site. I’ve recently been involved in setting up a site for an Iwi that’s also WordPress based. WordPress is pretty awesome at this and has a massive array of plugins. For example, we’ve used a WP plugin called UltimateMember that handles all the complexity around site membership/profiles etc. We’ve been using an Auckland-based website company called The Fold. Google them and have a chat to Daniel.