Yes and no. I believe the ASIN is the same internationally. So if you pull the ASIN of 0141036141 from[http://www.amazon.co.uk/Nineteen-Eighty-four-George-Orwell/dp/0141036141/ then use it with the bbcode the link will go to amazon.com/Nineteen-Eighty-four-George-Orwell/dp/0141036141/ which is still the page for the same book but not on the .co.uk version of Amazon. This may create an inconvenience if you then live in the UK and wish to buy the book or interact with your amazon account, but otherwise it will still be useful for the function of specifying which version of a book someone to which one is referring.
I hope in the future to provide more complete international functionality to this BBcode so that uses one's location setting to determine which version of Amazon to link.
Did you know ALynnPowers wrote books? I sure as naughty word didn't. Check it out!
"That virtue we appreciate is as much ours as another's. We see so much only as we possess." - Henry David Thoreau