@Austin: MY guess is that its hard to model for US cities, where there is already tons of featured modellers... so they will deny your model because they are certain somebody else will make the model.
but for Brazil? Ive seen some TRULY crap models featured on GoogleEarth. It seems Google´s standarts for models is set much lower when it comes to Brazil. They are eager FOR ANY MODEL AT ALL, no matter how crappy it is.
Look at the above shot of Porto Alegre. You can count the modelled buildings in one hand.
And here a shot of Porto Alegre
just too much work to do for them to be denying models for stupid reasons