Note that authors of accepted papers are expected to
attend
the conference and present the paper, otherwise
publication will be canceled.
That seems like a good way to ensure it remains a strictly North
American affair...
The same rule applied last year when WikiSym was held in what was
possibly the worst place for international travelers to get to (37
hours for me) yet certainly wasn't a Danish-only, or even
European-only, affair. I don't think it's unusual for conferences to
require that people attend the conference if they want to have their
paper published in the proceedings is it?
Angela