I have used Mac2Tivo frequently with Toast 10 and Snow Leopard. It was my favorite app. But like you, with Lion and Toast 11, NOTHING! And there's no one to speak to on the phone, either. I phoned Tivo for tech support first, and they were excellent. You'd think a company like Roxio could do the right thing for its customers. I'm very annoyed at this point.
What is the alternative you found? I'd consider buying it, too.