As for spawning of the shrines I have not found a single one in about 24 hours of gameplay looking through forest hills to the largest mountains of the extreme hills.
Now im not sure if this is a bug or not but when i place a shine in the correct biome for the bird only moltres is the one that works Zapdos and Aurticuno do not unless their spawn biomes have change.
Also mystery dungeon map was added I'm not quite sure where they are going to go with this but i could not find any odd generation underground using zan's minimap.
Another question i have is the itemfinder all it does is set the visibility of a chest and the owner of that chest (from server to the ability for players to open it), it does not help you find the items what so ever you see sparkle particles off invisible chests anyways so why was this added?
So lets just sum this up, Are the shrines and mystery dungeons fully implemented yet or are you waiting to implement them later?