12 uploaded, 3 pending, I have none listed that are rejected, but my draft rate is terrible. Since I upgraded to sketchup 8, it's usually taken 3 to 4 submissions and a couple of appeals to get my buildings accepted, though much of this is due to difficult terrain.
I think a "model this" competition would be really cool. I'm in the US, and I can tell you there are tons of small towns that would even appreciate a group of people modeling the landmark buildings in their community. I also think for those of us who geo-model for GE it would be an awesome way to help give practical pointers on one anothers' models so we can build a better GE.
I admit, building maker is not an ideal tool from a usefulness, efficiency, or geometric elegance standpoint, but it does get the job done as far as putting up a facade that goes a step beyond satellite imagery. It also populates buildings most wouldn't think to model, and all it takes to get some of those hideous models off is to model them better, which sketchup can do 100% of the time so long as a chimpanzee isn't running it. My brother's workplace is a great example, I've asked him to get me some pictures of his building, as the current one is a building-maker conglomeration, maybe I'll take before and afters when he finally gets them to me!