Works just fine from where we are.
If that doesn't work go to a USA proxy (use Google to search - if you can't find it sticky me and I'll send you a couple of links) as most will allow you to search Google and Yahoo from their front page as a test.
You'll see U.S. ads.
Now, can anyone tell me how to see ads for the new regionally targetted ads? It's amazing to me that I work in Canada, run ads for NY customers who do business in VT, and thus want their ads running in VT. And yet google doesn't think it's neccessary that I see the ads running in VT. /vent :)