World Border Increase / Farlands

The Minecraft world is 60,000,240^2 meters/blocks in size, but what if it could be more? I suggest an increase all the way to 2^27 blocks, or 134,217,728^2 blocks. At the end would be the Farlands, just like the glitch back in the Beta days, but this time it would be totally in and it could span about 1000 blocks in length, starting at 67,107,864 blocks away from 0x 0z. It could contain secret dungeon spawners such as creeper spawners or enderman spawners, or it could contain other things. This may be very hard to implement but I think it would be cool for Minecraft.