My company has an ecommerce website that's been online for about 5 years.  The url is www.betterbraces.com.  We're getting ready to launch an australian version of the website and the url will be www.betterbraces.com.au. The australian website will have the same look as the US website and will contain about 200 of the same products that are featured on the US website.  The only major difference between the two websites is the price that is charged for the products.  The australian website will be hosted on the same server as the US website. To ensure Australians don't purchase from the US site we are going to have a geo redirect in place that sends anyone with a AU ip address to the australian website. I am concerned that the australian website is going to have duplicate content issues.  However, I'm not sure if the fact that the domains are so similar coupled with the redirect will help the search engines understand that these sites are related. I would appreciate any recommendations on how to handle this situation to ensure oue rankings in the search engines aren't penalized. Thanks in advance for your help. Alison French