The public beta of Graphics 2.0 is now available for Pro and Enterprise subscribers to grab and start playing with.
The G2.0 daily builds will be available on a separate download page from the normal daily builds. You should continue to use the normal daily builds if you plan to release app as the G2.0 is still in an early beta state.
See the following links for more information:
Walter's Blog post: http://coronalabs.com/blog/2013/10/08/graphics-2-0-public-beta/
The G2.0 Daily Builds page: https://developer.coronalabs.com/downloads/graphics-daily-builds
The G2.0 Guide: http://docs.coronalabs.com/tachyon/guide/graphics/migration.html