It was just a matter of time before someone developed an app for the iPhone to cheat at cards. From the Las Vegas Review-Journal:
"The program calculates the true count and does it significantly more accurately," according to a Gaming Control Board memorandum sent to casino operators last week warning of the electronic device.
Interestingly, it's not illegal to count cards in Nevada. BUT...
... using a device to aid in the counting of cards is considered a felony under Nevada laws governing cheating, control board member Randy Sayre said. Gamblers using the iPhone card-counting program can be detained by casino operators and arrested by state gaming agents.