Actually, Human Rights Watch is currently focusing mostly on the US at this time. However, if you go to their site you can find broad criticism against Middle East regimes, China, and North Korea. Also they are covering the genocide in Sudan. Here's their UN section:
http://www.hrw.org/doc/?t=united_nations
Yes, but the problem is many American media neglect them because on essence they can't be used as ammunitions against domestic politicians they don't them (and you don't need to be an einstein to figure out who they hate :)).
Besides, these human rights organisation believe as if domestic nationalism over-rules general abuse on their report scale. So for instance a native dictatorship and a colonial regime commit the same abuses, the native dictatorship may get a B- and the colonial regime could end up with a D+. This is another example of relativism that I don't buy into.