The Blog Herald has a great discussion on blogging to a world-wide English-speaking audience (Choosing your English: the choice for new bloggers).

As a Canadian living in the US, my spellings have slid more towards the English(US) side of the spectrum in the last five years. This has been a matter of survival when dealing with annoying spell-checkers and US businesses (some of which claim to have a world view).

After reading the article, I think that I will make more of an effort to use my native spellings, and preserve what I learned growing up.