I think apple trees should be added to minecraft. Jeb did say he wanted to make apples somehow spawn in the world. These trees would be very rare to find and would drop 1-3 apples from it's leaves.
If Jeb already said he wanted to add apple trees, there is absolutely no reason to put a 2~3 sentence suggestion (that, for the record, has already been suggested countless times before) on the forum.
But yes, good idea.