Got iGuidance last night, installed under crossover office. Let me just say WOW.
This has exceeded my expectations by a long shot. And it works perfectly in "Car PC" mode with my lilliput touchscreen. This is basically a drop in working gps solution for my linux carpc. I couldn't be happier!
Although, on the down side, my gps dongle died last night (unrelated to installing the software). I order a new one, but have to wait to REALLY play with the software.
Currently I am stress testing it by using demo mode to play a route between my house in NJ and Caesar's Palace in Las Vegas I figure if it is going to crash at all, this will show me.