An except from the announcement:
"...The common codebase will be managed by the Liferay community with Sun as a committer and governance board member of the project. Over the past 6 months, Sun and Liferay have worked together to incorporate Sun's OpenPortal Portlet Container 2.0 (JSR286), Web Services for Remote Portlets (WSRP), and JSF Portlet Bridge projects into Liferay Portal. Over time, Liferay Portal will incorporate additional OpenPortal technologies such as Mirage CMS, Simple API for Workflow (SAW), and other projects that Sun and Liferay are planning..."
Some resources:
I posted about 2 years ago already an entry with similar title: "Glassfish could become the killer appserver for Java EE 5...", a kind of deja-vu :-). See you at Jazoon (I'm preparing the slides now :-))!.