I watched the WWDC keynote from home the other night, and think the App "Loopt" looks really cool. One main question though. Since Apple has said they don't want any background apps running, does eveyone who shows up on the map when you run Loopt from your phone have to be actively running Loopt on their phone? I wonder because, if I am downtown and check Loopt for any of my friends in the area, i'm only going to have Loopt open for like 20 seconds, enough time to look on the map in my area, and then probably close it. What are the odds that everyone is loading the program at the same time to see each other. This seems like one of those apps that almost requires being open all the time to function properly. Anyone have any idea how it's going to work?