Mozilla Thunderbird 2 Beta 1 has been released. Features new to Thunderbird 2 include message tags, folder views, session navigation history, a visual refresh of the theme, and improved new mail notification alerts.

Mozilla Thunderbird 2 Beta 1 is available for Windows, Mac OS X, and Linux. Localized builds will be offered for beta 2, currently scheduled for January.

Feedback on the release is being collected in Mozillazine forums

For more information, refer to the Mozilla Thunderbird 2 Beta 1 Release Notes.