Few things get our community excited like a major release version of the Zimbra Collaboration Suite. Today marks availability of the first GnR preview: ZCS 6.0 Beta 1 Open Source Edition. Admins and developers can find it over on the downloads page, for the less technically inclined we’ll also have a new hosted demo up shortly.

Some feature highlights:

» A new horizontal ‘three panel’ view with the message on the right.

» There are now tabs for individual messages as