The newsletter solution utilises content types, the search web service and sharepoint groups to collate and distribute an enterprise newsletter.
Using Nintex Workflow, the search web service is called to return all announcments and events that have been created on the portal in the last week, and have been marked as accessible to the entire enterprise.
Using XSLT, the results are formatted and collated in to an email, which is then sent to users who have subscribed to it's distribution