At SMX East, Bing Webmaster Center team announced new features that include the link report that went missing when they relaunched Bing Webmaster Tools and a feature called "Link Explorer." And today, Google quietly added percent change data to the query reports in Webmaster Tools. The new link report shows links gained and lost over time. It also shows you where the links came from and you can even export them.
They also added a feature called "Link Explorer" which shows you what Bing sees in terms of how they crawl your site. You can see additional details about all your URLs, you can request Bing to recrawl them and even block them.
Google also updated their tools while at SMX. They precent change data and rank change data to the relatively new query reports. Here's a screen shot: