Thread down the BB about Casino Business Card chips has spawned quite a few emails to me.
http://www.thechipboard.com/cgi-bin/bbs521/webbbs_config.pl/noframes/read/622242
GPI has been doing these for casino exe's for several years.
Only 100 to 110 of each were made.
I listed a number of casinos they were made for, see above link.
Add The Venitian, Wynn Resorts, and Mandalay Bay to that list.
The Palms has had more by far than any other casino, 21 different and one more in production at this time, total 22.