UpNext is a good idea.  A 3-D model for mapping out a city would be very useful for tourists, particularly combined with the iPhone’s GPS capabilities.  Currently, the app only covers New York City and Boston, but if successful I’m sure more cities will be on the way in the future.

Here’s the bad news: you need a WiFi or data connection in order to download the layouts of each cities.  The good news is that once each city is downloaded (which doesn’t really take that long), it remains ther…Read More