Pj, i am living in the US and have been on a few US forums, they are not quite as informal as the UK ones as its mostly replying by email to a given subject,
I started reading the UK sites about a year ago as I plan a move back to Ireland in the coming year and Intend to set up over there, i have found the UK forums very informatitive and helpful, and while never really intending to post but just read I asked a few questions and then answered a few and so on