I'm excited that Shadow Cities is helping bring attention to squatters and their vital communities. I just took a quick look around the web and found some notable recent items:
Forum: Qualitatative Social Research offers a review by Brian Christens.
The Epoch Times has a review by Molly A. Daniels-Ramanujan
Boing Boing provides a thoughful commentary; see also the reaction posted at Radical Congruency
Finally, Stewart Brand mentions squatters in his interesting article on Environmental Heresies in the May 2005 issue of Technology Review
Keep those cards and letters coming!