We've heard about unofficial Thunderbird builds and plugins that can allow it to use contacts from Address Book, but it seems their developmental progress has been stop and go over the past year. Enter Robert Coleman, a quintessential knight in coding armor who has released an updated build of Thunderbird that traverses the void between Mozilla's and Apple's address books - though it isn't without a little bit of fiddling and a catch. Robert had to post some vital instructions with the build which you must follow before you can get your hands on the goods, so read carefully. The catch? Address Book integration is read-only; you can't add new contacts from Thunderbird, but hey - it's a start.
[via Hawk Wings]