Hi
Try out my first Author-it Plug-in - it lets you annotate any object in the library. For any object type (for example, topic, book, or file object), you can attach a comment.
Doco and download available here:
http://www.hamishblunck.com/authorit/....
Hopefully, it goes without saying, that as a first attempt, you shouldn't use this with your production library :)
Let me know what you think here, or email me
here.
Hamish