Web sites are about sharing information, which is organized and controlled by a single person.
There is generally one voice on the site, and the site's organization is cohesive and methodical. Groove and Trellix now allow site builders to go one step further. It's about communicating with your visitors in a way that matches the task at hand. It's about multiple voices interacting. Adding Groove lets distant family members meet, talk online, and contribute pictures and stories to the site.