Membership Site Recommendation

I have an opportunity to create a website for the local chamber of commerce. There are a range of ideas as to what could be on the site, but a consensus seems to be that chamber members would have their own personal business page.

On this page they would put their contact information, and be able to post updates. These updates would then be rotated on the home page, with a link to the business page.

So…what recommendations does anyone have for doing this? Thanks in advance!