just a FYI on anyone with a mygig unit, here are 2 sites that will answer most questions, also i am told there is a map for aus update due for release soon
http://mofv.com/mygig/
http://www.wkjeeps.com/wk_nav_2.htm
the biggest trick with them is
1. upgrade to latest software
2. if you experience lockups or other bugs, disconect the neg off the battery for a few minutes so they perform a total reboot,
i am happy to help anyone experiencing problems etc