If you are going to add some flair like the above mentioned, maybe there could be a possibility to add a flag to every player, or if it turned up automatically when you have contry filled in.
It would look nice if you have a list of registered players on screen pre tournament, and on the lists showing ranking and prices, even in export would be nice.
Maybe not so many run tournaments with diffrent nationality's, but it might be a nice feature for commercial users at least.