iPhoto users have been stuck using only applescript aware e-mail clients 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. All the basics are there for iPhoto-Thunderbird integration.
If you’re an iPhoto/Thunderbird user, give it a whirl.
Here's what they had to say about it:
"Great tool. Thanks for publishing it!"