http://www.mozilla.org/ports/os2/
August 8, 2006 Thunderbird 2 Alpha 1 milestone has been released.
"The Thunderbird 2 Alpha is now available. This alpha release is intended for developers and testers. It is focused on collecting feedback for several new features including: message tags, folder views, a new Windows installer, and a new mail alert notification."
Zipfile:
http://releases.mozilla.org/pub/mozilla.org/thunderbird/releases/2.0a1/contrib/thunderbird-2.0a1.en-US.os2.zip
Release Notes: http://www.mozilla.com/thunderbird/releases/2.0a1.html
Requires a libc0.5.1 based version of the GCC runtime library.
http://www.innotek.de/products/gccos2/download/gccos2download_e.html
http://www.mozilla.com/thunderbird/releases/2.0a1.html
"Changes in this Development Milestone
There is a lot in Thunderbird 2 Alpha 1 that we invite you to play around with and give us feedback on:
* Message Tags
* Folder Views including favorite folders
* Improved New Mail Notification Alerts
* New Windows installer based on Nullsoft Scriptable Install System
* Find As You Type in the message pane
* New combined and improved Add-ons manager for extensions and themes
* Updates to the extension system to provide enhanced security and to allow for easier localization of extensions"
Source: OS2VOICE