Google's Matt Cutts discussed how the search engine handles sites that that are "in the cloud" with regards to how listings are affected. Matt's explanation was a response to the following user-submitted question:
Can moving my website to "the cloud" harm my listings? Say my server's in Germany and I move the website to Google's App Engine or Amazon S3. Does this harm my listings for German results - or is it enough to set the "geographic target" in GWT to Germany?
Matt broke the question down into separate parts to answer them. First, he took on the part about moving a site to "the cloud" harming the users' listings. His answer for this is basically that Google doesn't even know if your site is in the cloud, so it can't use that information to affect listings.
He says if your site is talking to the cloud behind the scenes, there is now way for any search engine or bot to know about that. Watch the video above to hear Matt's explanation for the second part of the user's question.