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Thanks Takeshi - useful comments.

The issue of duplicate content has been well documented and there are lots of articles suggesting to noindex archive pages in WordPress powered sites.

Schema.org allows us to mark-up our content, including marking a components URL. So my question simply, is no-indexing archive (category/tag) pages still relevant when considering duplicate content?

These pages are in essence a list of articles, which can be marked as an article or blog posting, with the url of the main article and all the other cool stuff the scheme gives us.

Surely Google et al are smart enough to recognise these article listings as gateways to the main content, therefore removing duplicate content concerns.

Of course, whether or not doing this is a good idea will be subjective and based on individual circumstances - I'm just interested in whether or not the search engines can handle this appropriately.