I was in California the 8th through the 16th and navigated extensively between Belmont Shore and Carmel. Although I'd ocassionally leave radio range, Bing Maps showed it's stuff all week, including always finding my location -even when our girl announced losing radio contact, I still got the diamond tracking my route throughout. BTW, the accuracy and GPS speed of my Focus easily bested whatever my friend had on his iphone from day 1, and we relied exclusively on Bing all week.
Back home now, I just clicked on Me in Maps and I am where thought I was. (disclaimer: I am pro-LJ)