You can use Google Maps API to get a JSON string with the distance, including driving directions, between two postal codes. The code is below:
Today I had the challenge of generating a view that needed to filter results based on the date/time a node was created. More specifically, I needed to filter bowling stats for a season. Easy, right? The problem I ran into is that the bowling season doesn't begin and end in the same year. So using an argument to only grab nodes created in 2011 didn't work. I needed the view to grab nodes between July, 2010 through July, 2011.