Jersey 0.7 - Out!
By alexismp on Apr 28, 2008
(this post was stuck in the "draft" category and should have been out a few days ago, sorry about that)
Of course it aligns with the current state of the specification but it also shows interesting work with JavaRebel, Spring and IoC's, Grizzly, Grizzly Comet, JavaRebel and has improved JSON support.
Who said Reference Implementations were useless proof of concepts?