Google (Local) Lab at Heathrow
I haven't been there in person, so I had to read about it on the Google Blog. Some time ago Google created Google Space (a physical place in Terminal 1) where users can access the Internet for free while waiting to board flights, etc.
![physical place in Terminal 1]("http://googleblog.blogspot.com/uploaded_images/Google_Space-705825.JPG"){kind=link}
Smartly, Google has used Google Space as a kind of ongoing focus group for Local (and Google Earth), it appears.