I just don't see why it's that hard to create one, just scan every card that come out and let the computer do every possible card counting system all the time (it will take no time to the computer), then let him convert to TC exactly, to quarter-deck and to half-deck for every system that require it, then it calculate how much a normal counter would bet there and if a player bet this amount of unit many times, the computer will put a red flag on him and calculate if he use system-X to count cards and bet, then if he change table the pit boss just say it to the computer so that since the computer scanned every tables he know the player is maybe counting multiple tables at once, etc.
Just thought about that =/
Would be kind of hard to manage against that and any good computer could do that >.<