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In Minecraft PE the horses will come soon since the pocket edition will soon get that update.
Beginning of February
April 3 2012
Early April
As of yet, you cannot make a snow golem in Minecraft PE. This will come in a future update.
Sometime late September
The next update for minecraft pe is expected soon with a lot of addition features.
If you have already purchased Minecraft PE, then update the game.
cuple days after xmas maybe befor
0.7.0 hasn't even come out yet
Yes
Pressure Plates, and indeed all redstone items, have not yet been introduced into minecraft PE. This'll come in a future update.