We were on the Wonder in January. I called in April and got our number and a promise of cards by the end of that month. I called in June, and was promised cards by the end of that month. Still not having them, I called this week, and they solemnly promised I'd have them before the end of this month.
We'll see, but it looks like the luck of the draw if you'll ever get anything. Calling doesn't seem to accomplish anything other than a very nice but empty promise. From what I've read here, though, it doesn't seem to matter anyway because I'm not sure what I'd do with the cards once I had them!
43 days and counting...