Many people, myself included, have held held back on moving over to Thunderbird because it has no integration with OS X's address book. Frustrating, isn't it? Well, the first step toward built-in integration has been taken. Peter Van der Beken has developed a patch to provide that integration. You still have to be savvy enough to compile it yourself, but if you are you get a sneak peak at the future. Bear in mind that there is still no AppleScript functionality, and that there are plenty of other reasons people like me stick with Mail.app (including the sometimes irrational hope that Apple will take IMAP a little more seriously some day), but if this is what you've been waiting for, wait no longer. Vafer.org has it working with the latest version of Thunderbird.

[via HawkWings]