Looks like Google’s gained a new direct answer service, whois information for domains. Enter a query like whois searchengineland.com, and you’ll be told when the domain was registered and expires, along with a link to more information from the Domain Tools site. Here’s a screenshot:
Google’s not done a formal announcement, but Matt Cutts just noted it on his blog here.
Postscript: Note, some people aren’t seeing this feature. It might still be buggy, while there also seems to be some availability issues, too.