“Off topic” - Google: You liked hamburger? We know where you want to shop for outdoor activities gear!
Today I was pretty amazed and decided to share my experience! Here it goes…
I am at business trip in Redmond, WA. Yesterday I had a launch at one of Red Robin's restaurants near my hotel at Overlake shopping center. I found the place using Latitude application on my Android phone and since the burger was very good, decided to “check-in” into the place and even had a small positive review:
Today I decided to go shopping for some “outdoor activities” gear and searched for REI store. For my complete surprise search engine suggested me some specific store based on my previous activities online:
I was simply amazed! This is definitely “intelligent” way to improve search results 
Keep it up, Google!
Alex