Hmm, I guess, technically, PPRuNe is US-based - I believe it lives on a server in the US, anyway, but I'm not certain. But Danny, who set it up and runs it, is English, a fairly high proportion of the members are British, and I think it's fair to say it's basically a British forum.
Having said that, though, everyone is welcome here. Many UK pilots, especially Wannabes, do some training or hour-building abroad, and it's always nice to talk to people from other countries and compare the way other systems work - not to mention the friends that you can make from all over the world!
If you're looking for something exclusively American, try scrolling down on the Forums page and you'll find a North American forum. But stick around in the other forums, too - I know I value input from all round the world, and I'm sure I'm not the only one!
FFF
-------------