Serbia and Montenegro amicably divorced in summer 2006, but please don't let the split put you off, as there's no reason not to get acquainted with Serbia.
Interrail Global Pass
BritRail Consecutive Pass - AD75
BritRail South-West FlexiPass
Eurail Four Country Select Pass
Eurail Global Pass
Eurail Three Country Select Pass
Interrail Serbia Pass
Interrail Switzerland Pass
Japan Rail Pass