This last virtual trip took all of 8 days to earn 10 new badges (between November 7 and 15, 2011) in New York and Montreal. Many new badges were introduced but also Foursquare introduced its new expertise badges at that time which allowed me to earn several with once check-in as I was at that point for many.
Foursquare has launched in mid-November expertise badges to maintain interest of past heavy users like myself and to offer more badges to non-cheaters who regularly check-in to similar places.
Are you planning a virtual trip? My first virtual trip online brought me to New York City with the clear goal of unlocking a good number of Foursquare badges – 10 in that instance. I’ve since accomplished 3 other such online expeditions; one in Chicago, another in Pennsylvania and a return trip to NYC – each unlocking many Foursquare badges.