I've read a number of threads from people and their experiences with Navigon software running on iPhone 3GS's. I have not seen many reviews with experiences on the 3G's. If you have any experience, good or bad, would you kindly share? I'm trying to make an educated decision on GPS software as I am going to retire my HP RX5900 pda running Tom Tom software. My 16GB iPhone 3G is approximately 4 months old, yeah jumped the gun just a hair too soon!!