For years, iPhoto users have been stuck using a limited number of email clients to send their photos easily. This was mostly remedied by the iPhoto Mailer Patcher, but it left out non-applescript aware applications because, after all, iPhoto uses applescript to interface with them. One of the more notable omissions is Thunderbird.
Finally, this void has also been filled, via the iPhoto Thunderbird Bridge. It’s still quite primitive, but all the basics are there for iPhoto-Thunderbird integration.
If you’re an iPhoto/Thunderbird user, give it a whirl.