Looks like I beat this one by a few months. SSL is now a ranking signal for Google. I switched this and a few other sites over to SSL a few months ago, while enabling SPDY and a few other things I’m playing around with. So far this has been pretty painless and actually simplified a few things. Doing this at scale with legacy infrastructure and 3rd parties however is a whole different ballgame. It will take a while for this switch to happen for bigger players not already on board.