Generally don't make too many assumptions about the address format if you're dealing with international customers.

Many of the address forms on US-sites are a bit challenging to europeans because even after selecting "Other" in the State-dropdown we're still left with a bunch of input fields that don't quite fit our local address format.

Most people (including myself) are probably used to that by now and just duplicate stuff as needed (City/State) and leave others blank. But I wonder what the bounce rate amongst less savvy users is for these forms.