Personally, I really enjoyed this project. I wish that I'd been able to talk to some of the South Korean students, but I really enjoyed reading the blogs of the Australian students. I don't think people around here are always aware of how interesting and different it is there. For example, I've always known somewhere in the back of my mind that the seasons there are the opposite of the ones here, but I never really thought about it until I read about them having their summer vacation in December and January. I also enjoyed reading about the various ethnic groups in Australia.
This must seem a bit strange for me to be saying, but I actually wish that we had done more blog posts (say, one every week?). I think that part of the reason I kept forgetting and doing them late was that we had such a long break in between posts that I completely forgot about it. It would also give us the opportunity to learn more about the people in our blog groups.

Yet again doing a late post...
I'd say that the population of the United States as a whole is very diverse. In fact, that's supposedly what this country's all about. However, people from different ethnic groups seem to settle in specific places, so small parts of the country are often not very diverse. This isn't as true in big cities like New York, San Francisco, and even Austin, to some extent, but more rural areas seem to have less diverse populations.
The U.S. tries pretty hard to promote understanding among people from different ethnic backgrounds, but much of its efforts are wasted. For example, schoolchildren are taught to accept different cultures and try to learn about them. But if these children go home to parents that are prejudiced against certain ethnic groups and spread that to their children, then what they have learned in school has little effect. I am not implying that this is all that common in America today. We've come very far in this area in the past century or so (just look at our new president-elect!). Unfortunately, we aren't finished quite yet.