Get me in person and I’ll go over several practical uses for the service. I won’t call it a social network, although it is, it doesn’t have to be. You can use it and NEVER share any of your data with outsiders all while using recommendations from others. Based on cumulative data, foursquare’s explore has collected enough data too accurately send me to a craft beer bar in the Village, a phenomenal hoagie shop in suburban Miami or lobster stand on the cliffs of Maine 20 miles from our campground. I imagine these would be recommended to a new user as well, but they were the top recommendation based on my historical data. I RARELY have a bad meal or go to a crappy place. (my profile)
Anyway, here’s three other practical uses, including using it as a personal journal, along with my fanboy rant:
Where I hang in NYC according to my checkins:
(create your own map at http://www.wheredoyougo.net/)
Bonus: Dennis Crowley, founder of Foursquare, gave me shout on Twitter after I requested a phone call.