If you guys really want to believe the earth to be some other shape than what centuries of science/astronomy/navigation/commonsense tell us all it is, be more imaginative please! Why not a torus shape? Think of the advantages: you can solve the age-old 'utilities' puzzle (supply Gas, Water and Electricity to three houses without any lines crossing) straight off (in fact you can get four utilities feeding to four houses without crossing). And forget that old Four-Colour Map nonsense, the toroid needs seven colours, and it can be proved without a computer. Think of the boost to the cartography and coloured-ink manufacture industries!
I rather fancy a Möbius strip, or even a Klein bottle, however. Then you can get to both sides of the Earth's surface (well in fact it's really only one side) without having to take a trip 'over the edge'. Double your land area in a flash...!