Today, I released ThunderBirthDay 0.3.3! It is already the third version compatible with the upcoming Thunderbird 3, but it is uncompatible with prior versions of Thunderbird. Therefore, the new versions are retained in the sandbox until now. It works already greatly, you can download it and try it out!
As Thunderbird 3 and Lightning 1.0 will be hopefully released very soon (see here and here for pre-releases), let me say how much I'm looking forward to this! Among many cool new features like tabbed email, there is finally native support for birthdays in the address book. This means that MoreFunctionsForAddressBook is not needed anymore, but also that their might be other cool extensions related to birhtdays :-)
Last but not least, an important note: There seems to be an issue with MoreFunctionsForAddressBook and upgrade to Thunderbird 3. The issue is being tracked here. Before making an upgrade to Thunderbird 3, please backup your Thunderbird profile! To learn how to do that, click here.
Now count down with me for Thunderbird 3 and enjoy the pre-releases :-)