Hi Ron,
It's still there. As far as I know the chips are still good. I will be going up there next month some time, so if you still have them, I can cash them for you. I'm not sure what they are worth in US $$, though. It fluctuates, and the casino doesn't give full exchange rate. I guess they even have to make money on that as well.
If you want to arrange something let me know.

Steve