Saddy here, posting as a test user to identify the problem and test.
You can enter the url for your image as BBCode: If you first select the ‘disable rich text’ option (just below your edit window) and type the following:
http://www.sadgeezer.com/Legacy/images/SadCAST-KDDthumb.jpg[/img]
should display
There is currently no facility to upload images to this server because of the security vulnerability. I intend to find a way around this soon.