I just wanted to remind everyone, that the string freeze for Thunderbird 3.1 beta2 and the Thunderbird 3.1 final release went into effect yesterday, Tuesday April 20 at 23:59 PST.
I am planning to accept sign-ins up until Monday April 26th pacific time for the beta2 release. For the final release the sign-in period will be a few weeks longer. I can't tell you at the moment how long, but expect at least 4-5 more weeks.
Please use the new sign-in functionality in the l10n dashboard to become part of these releases. Currently you can only sign-in for the 3.1 beta2 release. I'll open up the sign-in possibility for the final release soon.
Four bugs didn't make it in time for the string freeze. Those are bug 545469, bug 545955, bug 505035 and bug 394687. I've added the late-l10n keyword to all those bugs and asked the responsible developers to inform the l10n community once those strings have landed.