Just released Liferay Portal 6 RC 2. We are very close to getting the GA now. We had originally scheduled to make this the GA, but our release team wanted to make one more round of releases. We're now scheduling to release GA in another 2-3 weeks.
The major changes between RC 2 and RC 1 include changes to Workflow and OpenSocial as a first class citizen. Go here for a full list of changes.
Go SF.net to download the files.
I'm hanging out at our East Coast Symposium right now. Look forward to meeting everyone. :)