China Matters has an interesting post on the visit of the Dalai Lama to Mongolia, and what seems to be an ongoing crisis in Mongolian Buddhism. He also gives a little history:
...the Mongolian Communist Party Congress of 1925 announced that the Jebtsundampa would not incarnate again with the same religious and political status as before. Rather, he would be reborn as General Hanumant in Shambhala.
The jetsundampa is the spiritual leader of Mongolian Buddhism and Shambhala is a vague temporal representation of the spiritual plane. This must have been the only time when a regime got rid of an opponent by, effectively, exiling him to nirvana. I think that's known as an elegant solution.
More generally, Mongolian Buddhists are facing fierce competition in the soul harvesting business from both Mormons and Moonies. Lucky them.