The final specification is here: https://java.net/projects/jbatch/pages/Home
I am working with JCP to get it posted to jcp.org. That may take awhile longer.
FYI, we are finishing up final fixes for Java EE 7 and will publish/announce the final code release, soon, too. Stay tuned ...
Chris Vignola, STSM, IBM
JSR 352 Spec Lead
WebSphere Systems Management Architect
phone: 1+(720) 396-7501
[jsr352-public] Announcing JSR 352 Final Specification v1.0