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Hi, Rand did a Whiteboard Friday on this topic (http://moz.com/blog/subdomains-vs-subfolders-rel-canonical) - and also answered a question quite similar as yours (http://moz.com/community/q/moz-s-official-stance-on-subdomain-vs-subfolder-does-it-need-updating) => advice would be not to use subdomains but rather to use subdirectories (which corresponds with the advice Tony gave you) rgds, Dirk