Yup, I cover the US market.
Since you asked who Palit is I'll tell you. But keep in mind I want to keep the marketing BS to a minimum. The about us page will give you the background from a corporate standpoint,
http://www.palit.biz/main/about.php?id=20
I think that's prolly the best place to start and then you can ask questions about specific stuff.
The thing that makes us different is really several things. #1 is that we use our own design boards wherever possible. We try to improve the reference design as well as components including the obvious stuff like the heatsink. But we also do things like 3-phase power.
The best part is, since we're so big, we almost always have the best price.
But see? This is starting to sound like the same old marketing bullshit no one wants to hear and I don't want to be that guy.
I'll leave it at this and if anyone has any specific questions I'm happy to answer them.
There are already a couple really good threads in here so check out some of my other posts.