I had a weird experience yesterday! Is there any way to make it possible for you to disable/enable the GPS (iGuidances') improved menu and its icons/osk; the reason is that I really think it's very CPU intensive.
I'm testing a VIA MII and yesterday while driving I took different routes that required extra calculation, the machine totally locked up! It was about 1/2 mile between updates and it just became unusable because I was getting off-course...
I think if we can have that feature in faster computers that can handle the extra process it would be more friendly... Also with the new hacks being done on iGuidance the menu has improved a lot more from the tiny ones being used by the manufacturer.
Just my 3 cents now.. :)