Foursquare has posted an amazing infographic detailing just how good 2010 was for them.  Not only did the service grow by 3400%, but they had some really interesting check-in information such as which states had the most gym check-ins, what were the most popular hotels and much more!  They also announced that they hit 6 million users last week.  Check out the awesome infographic below to see some awesome information about were people are checking in! (click to enlarge)