On Zuiderdam last fall, I was told by the purser's office that any tipping over and above the $10pp/pd is also required to go into the "tipping pot" that is split between everyone. We still extra tipped our waiter, assistant waiter and cabin steward - and felt kinda sad that there wasn't a way we could actually give them more. The best thing to do now is to make sure you give them a great review on your comment card. As I mentioned in the RCCL forum - what I most disliked about "Freestyle Dining" was the constant rush and manic activity in the dining room - bussing and setting up tables for the next set of diners. And while no-one actually pushed us out the door, you definitely feel the need to open up the table for the next folks.