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Barry at Search Engine Roundtable has written about Google choosing their own page titles for your site, and I've seen reports of it here as well, so you're certainly not alone. Here's what Barry has written: http://www.seroundtable.com/google-title-selection-12989.html http://www.seroundtable.com/google-title-tag-13704.html

1. The lose of equity to those unwanted 'style A' pages - I think a series of careful planned 301s will be the solution. If you redirect the discarded pages you might have a gain in equity. 2. Possible loss of long tail traffic to the individual products which might not be caught by one individual page per style. Actually, with lots more words on a page you might have a gain in long tail traffic.  The only way to know is to try it... just saying this because it might not be a loss. More important, you might be moving away from a potential duplicate content problem as these pages might be very similar. 3. Internal link structure will need to be monitored to make sure that we're still highlight the most important pages as well, important. This job is always present.

The impact of the users interaction with the search results will be interesting to see. I'm certainly interested to see how the sub domain search plays out. It will be interesting to see how the search result pages perform in the  serps. If we go ahead i'll keep the mozers up to date with the effect.

Nigel, I'm so sorry I didn't catch this question earlier. There is a known bug in Linkscape where it is treating binary files as having links and is messing up the data. Please see this Q&A thread with an explanation from one of the Linkscape engineers. http://www.seomoz.org/q/competitive-edu-research-via-open-site-explorer

Thanks for your thoughts. Having looked into it, we've got 10 linking root domains which used to register through SEOmoz but are no longer doing so whose domain authority is above 70. This would suggest that they are still important enough to be crawled, however I guess I would need to get the PA of the linking pages that have been lost incase they are less important pages on large domains. I'll keep this question updated with anything else that comes up.