Alternatively you should just do a search for "Nigerian scam website" and look for a forum to post all your credit card numbers to.
I was going to suggest he wait for a call from CARDHOLDER SERVICES, and then give them every detail they ask for, including his numbers. But moving over to Nigeria may be a better alternative.
As much as I try not to be rude, some people seem to only take action when you finally give them a kick in the pants. But I don't know, this person seems to actually like being kicked so I am at a loss as to how to help him anymore. He'll probably find another gold-digger tomorrow and do the same thing all over again.