UPDATE AS OF 2/05/2008 FROM TOYOTA CUSTOMER CARE? NO, NOT REALLY!
A supervisor just contacted me today, and had the audacity to tell me "while it is unfortunate you are experiencing difficulties with your Factory Navigation System, (yeah like it doesn't know my home street address, so it can't give me turn by turn directions anywhere) Toyota WILL NOT Make Update Discs available to you FREE. Update discs are 'customer pay' items".
Well Know, So What Do You All Think of That, So much for Toyota Quality & Customer Care?
It is obvious to me that the money I paid for this Navigation System, WAS A COMPLETE WASTE, AS TOYOTA HAS NO INTENTION OF GIVING ME EVEN ONE LOUSY UPDATE DISC!

So if you are gonna get a Prius DON'T BOTHER GETTING THE NAVIGATION SYSTEM!

It is interesting to also note that while my wife was at Office Depot, she input our home street address into both a Tom Tom, and a Magellon Nav. System and both accepted the address and gave her turn by turn navigation to our home, with no problem at all.
Do yourselves a favor and Save Money, BUY THE AFTERMARKET NAVIGATION SYSTEMS!

I genuinely feel "just so violated" of being ripped off by Toyota!

So, as they say, and it surely rings true in this instance with Toyota, "BUYER BEWARE"