Apple ipod

What is the best application for the iPhone 2G GPS navigation?

I do not care if it is in the App Store or Cydia, or if free or release pay. I need a good GPS navigation application that can use the integrated EDGE / GPRS monitor and guide me from one place to another. I'm in the iPhone 2.1 firmware 2G.

Navigation is the best application "Maps." Navigation "becomes" is not yet available on the iPhone.

Best of iPhone Navigation Apps Video