iScribbled.com – Comment Where You Have To
http://www.iscribbled.com/

iScribbled.com provides a powerful realtime commenting tool to comment on specific parts of a web page. Use this tool if you want to enable inline comments and the comments are expected to be short. You can enable commenting on any div, paragraph or span element on your web page with a simple change. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.