Be careful with duplicate content when targetting two countries
Links into your website from other websites are one of the key factors that Google uses to determine your PageRank, Link Popularity and consequently relevancy and success in its listings.
Duplicate content is a hot issue at the moment, and is clearly a major factor in terms of why some pages perform well on Google and some do not.
Google recognises duplicate content both between two separate websites and between pages within one website, and it seems that every page will get a duplicate content score as part of the overall algorithm that Google uses to assess website success. Duplicate content is what it sounds like: two pages having the same or very similar content.
A classic example is when a company has two websites targetting two geographic regions (eg NZ and Australia), and the two websites are the same except for the geographic content. This is common when a business expands into another country and they simply copy their website for the new country and launch it under that country's domain. These will be seen as duplicates, and usually the second one launched onto the Internet will suffer the most in terms of how well it performs on Google.
It is essential that if you have two websites targetting two countries for your business you ensure that the content is not the same. You need to rewrite the content of one to ensure they are disimilar enough to not be seen as duplicates by Google.