Hi Andrew,

Here are my tips on ranking well for the US:

1. Host your server in the US
2. Sign up to Google Webaster Tools and set your location to United States
3. Get some inlinks from US sites

Also bare in mind the chances are your keywords are going to be a lot harder to rank for in the US due to increased competition.

I hope that helps,

K

I don't understand why you don't just use the rel="canonical" plugin I mentioned above... ?

I agree with THB on this, use rel="canonical" you simply want to say to the search engines "Hey this is the preferred URL for my content".

301's are for saying "Hey this page has permanently moved to a new page/site"

I would use the rel="canonical" plugin I posted for you above, it will automatically add the canonical tag for you, job done.

It looks like this plugin will add the rel="canonical" tag for you automatically: http://yoast.com/tools/magento/canonical/

View the source code after you have installed it to confirm it's working as expected.

Agreed

I would just add:

rel="canonical" href="http://www.mycompany.com/blah.html" />

No need to add 301's.

This might be useful it's Magento specific: http://www.magentocommerce.com/wiki/adding_canonical_url_to_cms_pages