Well, there's a lot of factors here... HTML5 Geolocation is not very accurate if the device doesn't have a GPS. You can always enter your location manually from tne settings pane (the more specific you are the better). If the app got stuck at "looking for data around you" then one of the services (twitter, instagram, foursquare or youtube) failed and the app tries to get results from the services again. Sorry if your expirience wasn't good :(