Heroku's Cedar Stack goes GA

In case Heroku needs names for future stacks (Aspen, Bamboo, Cedar...), here are building names from the De Neve housing complex at UCLA:

(Acacia) (Birch) (Cedar) Dogwood Evergreen Fir Gardenia Holly

Is there any plan to support websockets on the Cedar stack? Cedar currently does not support websockets: you can only do long-polling.

What does GA stand for?