[Pokerho]

I would absolutely contact the ISP, and almost certainly contact the Canadian authorities. The ISP will tell you exactly what you need to get the IP trace, and while you may never get your money back, you could at least have the satisfaction of putting a scumbag thief in jail. Plus, you might get your money back. No downside as far as I'm concerned. I'd certainly even consider contacting your local authorities, though I might not mention the word poker until you are actually talking to a detective.