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This site was unavailable for an hour or so due to me :(. Despite some experimentation on a VM I dropped the ball upgrading Apache to 2.4 and switching to using PHP FPM. After I have tweaked a bit I will be posting updated details on the site-technology page.
I want to play with some new toys, so didn't take the care I would over proper work. The good news is it appears to quite nippy now (so very un-technical).
Once Drupal 8 gets to Beta stage, I will be experimenting with the blog module and comparing some performance issues for differing approaches, I wanted to get that work out of the way first.
Back to normal.