10/11! I missed Spain! :imbar
Here's a tip :: In many parts of South Asia, you really ought to leave a tiny bit of food on your plate - it signals the host that you are stuffed and that you possibly cannot force another morsel down! (mostly around East India and South India).
The Right hand rule is VERY prevelent throughout much of the East. For example, if you are exchanging money at a transaction with say a shopkeeper, some will refuse to accept money if it is given with the Left hand.
In many orthodox homes in South India, it is completely inappropriate to even rest the left hand/arm on the table. Or to use it to serve food for yourself (take some stew out of the pot for example, even using utensils). The left hand is NOT to be used. Since most people use their hands to eat food, it is also bad manners to use the right hand to make use of an utensil to serve food with. Which is why always one/two members of the family serve others and after they have done eating, those who have finished eating serve those who were serving before.
I also know that in some parts of the Middle East, burping after a good meals indicates satisfaction.