I was looking at this today too.... It looks like a good extention, but there always seems to be a hype of the what's new, and I'm not sure if I see much here with .co.... It's for Columbia, I think it's great for anything that has a significant presence it that market specifically.... Even .us here in the United States doesn't seem to hold much value or popular use... At least from what I've seen and in my opinion.... .co sure does sound like one of the better new ones, and there may be some type in traffic for generics, but I don't know yet if I will use any of them.... But I did just here about them today, so I will be looking to see what everyone else is saying with them....