MailPictures is a plug in for the Mail application shipping with Mac OS X. MailPictures allows you to have your image show up in your mail message when you send it to a user who has the MailPictures installed. It works completely transparent to the user, no further intervention is required. It also uses the build in mechanism provided by Mac OS X and (optionally .Mac) for storage and display of the images (see AddressBook application for more details). This is not only a very geeky feature of Mac OS X, but an invaluable tool to recognize people who you only know by email. The more people who are using MailPictures the better it gets. SoMore...
Version 4.0beta works with 10.4
Mac OS X 10.4 or later, Apple's Mail.app.