Hello All,

I am currently update my site which selling products mainly in US.

But we have some sub-domain which I have set up for the different currency.

For example:

http://www.domainname.com/product1.html

then
http://canada.dominaname.com/proudct1.html

http://uk.domainname.com/porduct1.html


after a few months running, I have found google hard to found the sub domain link, yahoo always showing the wrong link which always show my sub domain link, and MSN seems ok. As yahoo is a biggest concerns, I feel I may doing the things in a wrong way.

Now, I would like to change everything back to main domain. But I don’t want to showing the duplicate pages to violate the SE’s rules.

So there are some options

Option 1:
(I like this one, but I am not sure if SE’s consider this way may duplicate the same content, and when people search like “Porduct1”, which link will be rank at top ?)

http://www.domainname.com/product1.thml
http://www.domainname.com/product1_ca.html
http://www.domainname.com/product1_ik.html


Option 2:
(this way, may increase the number of page on SE’s, but the first one may ranking high)

http://www.domainname.com/product1.html
http://www.domainname.com/product1.html?c=ca
http://www.domainname.com/product2.html?c=uk

option 3:
(no change on the url, will redirect when they click on the different currency)

http://www.domainname.com/product1.html


OPtion 4:

Just keep the sub-domain as the way it was, but may doing something to transfer the weight to main domain product page.




I am really appreciate anyone could share your experience.

Many thanks in advance.