If I am understanding JAZ's question correctly I too feel this is a huge functionality issue.  I was on the verge of purchasing Directory for a series of projects but the one element missing from theme is the ability for the user to easily map directions from their location.  It's as if you are being shown all these wonderful possibilities but being told you will never find them.  Brilliant theme that I believe would dominate the market if this functionality was added and if it is added I will be purchasing it for myself and many of my clients as soon as it is updated.