On of the reasons people crave chocolate during TOM is the need for extra iron. Try having a 4oz steak and 1/2 cup spinich maybe. There are sugar free chocolates out there, but they can stall some people, and during induction you do need to be breaking the sweets habit. If it is a matter of you need something or you will cheat though, I'd say pick up a low carb protien bar. You can also try Chocolate DiVincci syrup to sweeten tea or coffee to see if that helps.

There is also a suppliment in the Atkins book to help with sugar cravings. L-Glutamine I think.