tedster - 11:14 am on Oct 14, 2010 (gmt 0)
Yes, this is something very new. Google blogged about it just yesterday, when this thread began:
The "Links to your site" feature in Webmaster Tools is now updated to show you which domains link the most to your site, in addition to other improvements. On the overview page you'll notice that there are three main sections: the domains linking most to your site, the pages on your site with the most links, and a sampling of the anchor text external sites are using when they link to your site.