as most of you know, after the successful release of Thunderbird 3, we are now moving towards our next major release Thunderbird 3.1 (codename Lanikai). Lanikai is scheduled to be released in early April 2010 and will be a considerably smaller release compared with the move from TB2 to TB3. This should result in a lot less string changes.
A draft release schedule of Thunderbird 3.1 is available on the mozilla.org wiki. Please note, that this is a preliminary schedule and still subject to change. In case of significant changes, I will of course notify the l10n community as soon as I become aware of those changes.
As of now, Thunderbird 3.1 is developed from the comm-central repository for all TB-related changes and the mozilla-1.9.2 repository for all core backend changes.
As a consequence that, l10n work on the respective TB3.1 localizations should happen on the respective l10n-mozilla-1.9.2 repositories. The same repositories that you use for the Firefox 3.6 localization.
For this we have updated the l10n dashboard. The tb31x tree there should now correctly report each localization's l10n-status. Looking at the dashboard now, it looks like many localizations will need to sync their 1.9.2 l10n repository with the work that they performed on their 1.9.1 l10n repository already. Some locales will have to move all their Thunderbird-related work (mail/, editor/ directories plus from other-licenses/branding/thunderbird/) over to their 1.9.2 repository. If you need any help with this, feel free to contact me and I'll help you with the move.