3PointD has a post up about the opening of a 911 memorial in Second Life:
The memorial is a large square marble monument that has water in the middle. The names of the victims of 911 are listed around the square on the walls of the monument. In one corner you can enter a walkway that displays all of the pictures of the victims of this tragegy.
Walking around the memorial really puts the scope and scale of this tragedy in perspective. So many names listed on those dark marble walls.