hey, if i have 2 laptops in 2 different cars. is it possible to setup an IM service between them while driving? let's say i'm going on a road trip and don't want to call each other cause of long distance. i know i can create a network with my airport card...what's the farthest distance it could connect to? if i could stay connected, what software would i use to communicate? if both laptops had a gps system, is there a way to connect them both so i could see where both cars are? i'm just wondering..