The difficulty is in designing a system that lends itself to intuitive use. As suggested, the reader would normally scrawl something in a hardcopy margin. On screen, it must be typed. Further it has to be placed within the bounds of whatever representational system is in use. And it must be done in a way that doesn't interfere notably with original text. Current Web technology (HTML v2.0, cgi-bin scripts in Perl and browsers like Netscape v1.12) doesn't properly provide for the level of interactivity which would support an effortless notation system. Rather, more cumbersome work-arounds are necessary, in anticipation of Java and other environments which support true interactivity.
Annotation Form Interface

          Your name: 
     E-Mail address: 
 Annotation Subject: 
        Related URL: