New York City is once again the recipient of more cutting edge advertising technology. The MTA is testing out digital screens that will display ads on the side of city buses. (Hooray! High tech urban spam!) The interesting angle here though, is that the ads will change as the bus moves through different neighborhoods. GPS technology will register when the bus passes into a new area and serve an appropriate ad. Content will also change based on the time of day – think coffee ads in the morning, beer at night.