Grizzly Discussions
Eclipse Grizzly discussions can happen in several locations.
GitHub
You can follow activity from the GitHub repositories. Be sure to click the Star, or Watch next to any repository you are interested in following (Watching sends you more notifications than just clicking on the Star). The respositories are all listed at the Developer Resources tab of the Eclipse Grizzly Project Page. As of this writing, the following repositories are included in the Eclipse Grizzly project:
You are welcome to browse or file issues against any of the Eclipse Grizzly repositories:
Mailing List
The Eclipse Grizzly Mailing List is grizzly-dev@eclipse.org. You may subscribe and view the the archives using this web-form.