By alexismp on Dec 14, 2011
It should look and feel very similar to what you've been used to as this uses the same underlying Confluence software.
The most important change is probably that the Wiki is now Oracle SSO-protected.
While at the time of writing, the older sun.com-hosted wiki is still accessible, it's going away any day now with redirects to the newer instance. If you have questions or concerns, please email wiki @ glassfish.java.net.
Other notable GlassFish-related wikis that have migrated as well include Jersey, UpdateCenter, and IpsBestPractices. With this migration out of the way, I think we're done with Sun->Oracle migrations as far as GlassFish is concerned.