Google has a OneBox result named Q&A, we discussed it a while back here. Google pulls answers to questions from sites it indexes. But we have one documented case of a site that is not included in the index, but does return results for the Q&A style searches.
Conduct a search on % of African American in Los Angeles and you should see a Q&A result that looks like;
But if conduct a site command search for the site at Google you get no returned results. Same thing if you try just searching on the domain name, "Sorry, no information is available for the URL idcide.com."
This question was posted at Matt Cutts blog and then reposted at DigitalPoint Forums.
Forum discussion at DigitalPoint Forums, the thread is named Google Using Sites for Own Purposes Then Dropping Them?