If you've got the beta capability, you've automatically got this new ability.
Visit the emailpost page for basic instructions on email posting.
To post pictures, simply attach images to your email message. The pictures will be stored on your Fotobilder account, and the text (with links to the pics) will be posted to your journal.
Test with your camera phones! (if your camera phone adds a custom signature to the bottom of your messages, don't forget you can add '--' to your message to remove it. If your camera phone is adding unwanted text elsewhere, please let us know about it here.)