Coming from someone outside of NYC/SF: Foursquare has hit the masses and I have friends/family who have just discovered the app. It takes a surprisingly long ti

Coming from someone outside of NYC/SF: Foursquare has hit the masses and I have friends/family who have just discovered the app. It takes a surprisingly long time for new concepts to implement to non early adopters. So even while it may not be "trendy" in the SF area the app is pulling in a lot more "regular" people now.