I added a new mod to the forum this morning. If you visit a member's profile page (or hover the mouse cursor over a member's name to get the profile pop-up), there will be options to view an "Attachment Browser". The attachment browser let's you find all the images that member has posted to the forum. If you click on an attachment image in the browser, it will take you to the message where attachment was posted. You can then easily copy the image link to re-use images that have been attached/uploaded previously.