http://windows.microsoft.com/en-US/windows7/How-to-use-Web-Slices-in-Internet-Explorer-9

<p>A <strong>Web Slice</strong> is specific content that <abbr title="">ie9</abbr> automatically updates whether you visit the site or not. 
Clicking on a <strong>Web Slice</strong> in the <b>favorites bar</b> allows users to view recently published content.



Web Slices
http://www.helium.com/items/1520775-web-slices-in-ie8
http://blogs.msdn.com/b/innov8showcase/archive/2009/09/21/use-ie8-web-slices-to-update-your-loyal-followers.aspx