Any recommendations from road trip lovers?
I'm loving iExit and Wikihood.
iExit rocks. It tells you what's off every freeway exit -- restaurants, shopping, gas (even biofuel), coffee and much more. It even tells you which exits have ice cream, with an ice cream icon, lol. It identifies fast-food restaurants vs. sit-down ones, which is great if you're tired of eating nonstop fast food on the road.
Wikihood tells you about stuff -- sights, history and such -- around you as you move around.
Of course, you can best take advantage of such apps with a 3G model, so you can use GPS location services.