The situation has changed. Sony has stated that they will recall a number of their batteries but they have not specified how many or which models. I signed up on their support site to be notified if my T370 needs a new battery. If you go to sony.com and search for “battery recall”, you will find the page. I’m sure the risk is minimal in any laptop owned, but i won’t pass up a chance for a new battery.
I heard about the recall on gizmodo.com (or maybe engadget.com).