Zotero - New research management tool

In an earlier post, I noted some helpful online research tools. I just discovered Zotero which I think surpasses any other research management tools I have seen. It is a free, Firefox extension, but it has some astounding capabilities. You can take notes (both highlighting and sticky notes), export bibliographic data, and create links with online and local resources. Be sure to take the tour to see some of its present and projected capabilities. You will definitely want to check it out.