Of course, Foursquare was recommended by one of my most valued teachers, Jack Humphrey. He is a trusted source when deciding which software and social marketing tools to work with.
Apparently Foursquare has been growing like wildfire. It’s even been advertised at Time Square. I suggested it to a few close friends, now my entire social network knows about it and a few are using it consistently. Head over to TechCrunch to read more about Foursquares recent success.