Turns out Artworld was at a real-life lecture at the time, and that the tour was being broadcast to a live panel! There is now video footage of it on the web --
Here's the description from the page itself:
The New School
New York, NY
Feb 13th, 2008
Parallel Worlds: Explorations in "Second Life" with panelists Fred Ritchin, NYU professor and a contributing editor of Aperture; Michael Van Horn, curator of the Joseph Monsen Collection in Seattle; Richard Minsky, founder of SLART magazine; and Michael Schmelling, photographer.
Presented in association with the first of a series of articles in Aperture wherein Fred Ritchin explores "postphotographic" media and emerging technology, this discussion focuses on the 3D virtual world Second Life, created entirely online by its residents - The New School
The entire lecture is rather long, but if you look to the right of the video screen area, you will see a menu listing several segments -- Arthole is number 6 on the list.