This is a sweet Firefox add-on that has some pretty compelling reviews. This may be the way out of Endnote for some people and definitely might be the thing to save others from investing in Endnote or other clunky alternatives.
Here is the site.
Here are some reviews:
http://www.insidehighered.com/views/2007/09/26/mclemee
http://www.devangoldstein.com/93/zotero-vs-endnote-for-fall-of-07/
