MapQuest optimized for the iPhone has been released. The new iPhone interface includes the same features that MapQuest provides on the full-browser experience. Driving Directions, Maps, Local Search, Traffic, Recent Locations, and Cheapest Gas Prices, with more enhancements showing up automatically in the near future.
How do I get there? Just type mapquest.com into your iPhone or iPod Touch Safari browser, and you'll get new iPhone web interface. Once there, you can tap the "+" at the bottom of your screen and select "Add to Home Screen" to place a shortcut icon on your iPhone's main menu screen. You'll then see the MapQuest Star icon on your screen for easy access back to MapQuest.