Hi,
Here you have interesting articles about customs in other countries.
http://dreamnepal.wordpress.com/2006/05/19/take-your-shoes-off/
http://www.kwintessential.co.uk/resources/global-etiquette/new-zealand.html
http://www.chinateach.org/index.php/facts-articles/customs-greetings.html
http://en.wikipedia.org/wiki/Etiquette_in_Japan
http://shoesoffatthedoorplease.blogspot.com/
goodluck!
JCA