Binding of Cities to States.

Country and State/Province dependencies are OK, but I would avoid doing the city one. There are thousands of cities in a particular state/province and I would hate to have to scroll through them all. You could do an auto-complete text box instead or after the user submits it verify the name against the database. Or you could skip all that and just have the user enter the postal code and look up the country/state/city from that... If multiple cities per postal code, just ask them to choose.