Yahoo just released it's new way of showing backlinks. When the backlink command is performed (link:www.examplewebsite.com) a new format is presented where there is a button labeled "site" and a button labled "inlinks" and other buttons labeled "explore."
The button labeled "site" shows how many pages Yahoo has indexed for a particular site. The button labeled "inlinks" seems to indicate how many links are pointing to the site. The buttons labeled "explore" seem to run a querie of the same imformation yet for each inlink.