My recent post on the flavor of Guinness in the USA has spawned some controversy over where the beer is actually brewed. I hope this clears up any misunderstanding.
Guinness Draught: Brewed in Ireland by Guinness & Co. St. James's Gate, Dublin, Ireland.
Guinness Extra Stout: Brewed and bottled by Guinness Brewing Company, Saint John, New Brunswick, Canada. Product of Canada
Guinness Foreign Extra: Brewed in Ireland by Guinness & Co. St. James's Gate, Dublin 8. Product of Ireland
So the by-far-most-popular version is brewed in Dublin, as is the newly-reintroduced-to-America version. Only the USA's Extra Stout version is brewed in Canada, by Moosehead.
(See also Your favorite "import".)