Here is an interesting slashdot news article on casino security...some of the comments are interesting...the site with the main article might be down from being 'slashdotted' I think there is another link in the comments section.
http://it.slashdot.org/article.pl?sid=08/03/11/1616220&from=rss
http://it.slashdot.org/article.pl?sid=08/03/11/1616220&from=rss