I know sometimes I miss the smoke flavor of a real charcoal grill when working with the Foreman (or with a gas grill, too, for that matter). However, I have a secret ingredient: Lapsang Souchong tea. It's a smoked tea, and adding a strongly-brewed half cup to a marinade imparts plenty of smoke flavor. After marinating to taste, just pop on the Foreman, and you've got something resembling smoky barbecue flavor!
Just a little tip I've found in my cooking adventures.