About a month back we released GlassFish gem ver 0.9.0. I am happy to report that  GlassFish gem ver 0.9.1 is released. It has lots of bug fixes and some performance improvements. It was pretty hectic month with lots of fixes and specially our efforts towards performance study of GlassFish gem and JRuby. 

Merb and edge Rails support has been improved and is much robust now. Many thanks to Yehuda Katz on the feedbacks and improvements related to Merb support and also to the JRuby team.

To get started refer GlassFish gem README.

Or just install the gem by typing

gem install glassfish

To run simply type glassfish in your Rails or Merb application directory or type glassfish -h.
Try it out and send your feedback to the forum and report any issues at the issue tracker.