The JMS 2.0 Proposed final draft has now been published on the JCP website.
I've put an announcement on the front page of the project wiki
http://java.net/projects/jms-spec/pages/Home#JMS_2.0_Proposed_Final_Draft
this links to a JMS 2.0 Proposed Final Draft page
http://java.net/projects/jms-spec/pages/JMS20ProposedFinalDraft
which contains information about how to download the proposed final draft, how to make comments, where to find the
reference implementation, where to find the JMS 2.0 demonstration examples, and to see a summary of what's new in JMS 2.0.
I've written that "Comments are invited but must be received in time to be considered and incorporated in time for the
final submission on 20 March 2013".
Nigel