My brother turned me on to this marinade... Basque Meat Tenderizer and Barbecue Sauce. (Note for link: beware cheesy music!) It's basically a marinade of red wine and spices. I've been using it for a few years now, and haven't tired of it yet. I cover pork, chicken, or beef with it in the morning and grill it at night. They also have a fish sauce that I've used on fish, but I don't taste much difference from the original.
