From my vague listenings to radio 4, I think there's a fairly strong independence movement in montenegro. Got a vague memory of hearing about some arguments about who represented them in the eurovision song contest. If that's the case then you'll probably get a fair few of the local players doing what the fan's want and playing for montenegro, although it's a pretty small place.
Think Montenegro has been declared an independent country acknowledged by the UN.
It already uses the Euro, so will probably join the EU before long.
The old Milan star from the mid 90's Dejan Savicevic...is the most famous Montenegrin player, and is/was head of their FA. (doubt because Savicevic is a bit volatile)