As already pointed out in this blog post, GlassFish remains as open as ever at all levels and we're happy to report that Serli (a software company based in France) has recently contributed an "application versioning" feature to the ongoing GlassFish 3.1 development work.
This design document has a detailed description of what this is all about and the the feature is implemented in the very first milestone, GlassFish 3.1 Milestone 1 which should be out any time now. The Serli guys are working on a demo demonstrating the value of such a feature. A screencast and an interview should also follow shortly. Update: the screencast is now available here and the podcast interview is here.
For this feature just like for everything else planed for 3.1, you are encouraged to review and comment on the 33 one-pagers (on your favorite one at least) listed on this wiki page. Comments are accepted for another week or so, but of course the earlier the better. Feedback should go ideally be provided on the wiki (see instructions) but replying to the forum or mailing list is quite acceptable.