As a fan, I searched for any signs of the chips they used on the show. Not much detail shown in the Versailles Casino shots. For anyone interested in the book, you not find this page in the first ten with a Google search, but it comes up as the sixth listing on Metacrawler.com . One more reason why I don't Google everything anymore. There are other ways to find better information than the Google's, link based algorithm that excludes many smaller sites, and commercial sites, with closer matches.

http://pages.prodigy.net/jimprufrock/

For anyone who missed the Push Nevada Experiment book, which was never released. (may have been printed for some Hollywood promotions?) Look down near the bottom of the page.

I'm waiting for the DVD to come out with the unseen footage. I suspect it will never happen. In the end, the show was just too weird for mainstream audiences.