Heroku's Cedar Stack goes GA (opens in new tab)

What does GA stand for?

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.