Nature weekly: "Mapping for the Masses"
Several of the articles are viewable for free online. Also, Butler is interviewed about the articles for the week's Nature podcast.
I would recommend visiting Declan Butler's blog. There's likely to be a great deal of discussion on related matters on his site.
Though I haven't completed a detailed reading of the articles, I know that Dr. Mike Goodchild from here at UCSB was interviewed. Happily, I was consulted too, but mostly just to clarify items discussed by Dr. Goodchild. Virtual globes mentioned: Google Earth, NASA World Wind, ArcGIS Explorer, Skyline Terra, and Celestia.