I'm building application using GWT and one of the requirements is to index a text and then allow users to add comments/notes/sticky notes to that text. I found library called Annotation, which is pretty good but then I will have to have separate version of the documents for every user, that is not acceptable for us. We need to have only one version and then use that version as base. Is there any other way of doing that kind of annotations? Is there any libraries for GWT that already do that for me? The good example of annotations that I need is Google Wave. I was always wondering how they did all those blips in wave?