Loopt was a service too US centric. At least in Mexico, the current trendy option is Foursquare. As for Gowalla (My favorite one), didnt do so well in the begin

Loopt was a service too US centric. At least in Mexico, the current trendy option is Foursquare. As for Gowalla (My favorite one), didnt do so well in the beginning. Maybe, what the trend is showing is more adoption from outside the US.