True vanilla servers do get targeted by griefers more often, but I have to agree with RurouniTim. The servers are harder to find, and almost always white listed, but well worth searching for. This trend of multiverse servers has me playing LAN more often than not now.
a bit of guess work should do the trick, when I'm missing the y, I go with 70 - 80. have tp'd into stone a few times. In creative, y 150 always works for me.
Not exactly a mod, but there is always MCedit. It hasn't been upgraded to 1.4.2 yet, but if you don't mind not seeing the graphic for the new blocks (anvil, command block, etc.) it works just fine.
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Seed: 135848
Have to add on large biomes, still have not found the ocean.
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