This Jaddresses component is better than the built-in contact component of Joomla 1.0.8. But after tried for a few times, I found this one should be improved further.
The Admin should have the option to limit the length of post code since it varies from country to country.
Another important thing is, address format in China is always begin with the country and end with the room number. So if you want to attract over 100,000,000 internet users in China, you should consider to modify the code and allow the Admin to adjust the output order of those entries of the address.