Reading the headline I thought they were introducing a SQL like interface to their API, sort of like FQL for Facebook and I got a little excited. Something like this to get the email addresses of all your active trial subscribers:

SELECT c.email FROM customers c, subscriptions s WHERE c.subscription_id = s.id AND s.status = "active" and s.trial_start IS NOT NULL;

(where of course the customer and subscription tables would be a virtual view on your customers and subscriptions)