Does anyone know a simple way to "flag" an ancestor, or set up a space on the home page with links to access ancestors that have interesting histories?
Unfortunately, we don't have this, but its a really great suggestion. I'll make sure the developers hear about it!
You can add news articles to your family site though. These will appear on the Home page of your site so your family members will see them when they visit the site.
Articles can be added in the Apps tab on your site.