Two famous demo sites for Webslices/Webchunks are Digg and the webslices-enabled page at Stumbleupon. Unfortunately, both of them use Webslices/Webchunks almost badly since their slices contain a number of diggs or a number of reviews attached to the link they present. It means that even if the "useful" content does not change, the slice can be shown as "updated" in the browser only because the numbers changed... I understand they want to show these numbers but from a user's perspective, that's counter-productive.