Found via an article on the service at Nature News [1]<p>[1] &quot;Annotating the scholarly web&quot; [ <a href="http:&#x2F;&#x2F;www.nature.com&#x2F;news&#x2F;annotating-the-scholarly-web-1.18900" rel="nofollow">http:&#x2F;&#x2F;www.nature.com&#x2F;news&#x2F;annotating-the-scholarly-web-1.18...</a> ]