Whenever I look at page to page, post to post, blog to blog and domain to domain relationship statistics (and permutations across them) interesting things often emerge. Microsoft's Live Search recently released a linkfromdomain operator that can help dig into these linking relationships. For instance, linkfromdomain:arachna.com ruby returns the pages that I've linked to that have ruby in the text. Combined with the site operator, I can do a search of the pages I've linked to on Technorati with linkfromdomain:arachna.com site:technorati.com.
Looks like the blogosphere is noticing, within the last two days Technorati has seen 57 links to the linkfromdomain announcement blog post. Kudos to MSN's search team for a cool innovation.