Get Directions
Google's route finding service is not available under the API. The only way to currently offer directions is to throw a request at maps.google.com, and have the results be displayed on a real Google map. You can arrange for the resulting Google map to be displayed in a new window.
http://www.econym.demon.co.uk/googlemaps/basic4.htm
If you want something simpler, you can just provide a link to Google Maps with an empty &saddr. When Google Maps loads, it will display the &daddr destination, and allow the user to enter the start address.
http://www.econym.demon.co.uk/googlemaps/examples/map4b.htm
We can incorporate the simpler version of getting directions to our event location and display the same in a separate tab window within the same application.