according to Norman John and Nokia Conversations more phones will get the FREE Navigation in OVI Maps 3.03.

After the the flagships N97, N97mini, N86, X6, 5800 and E72 the probably most selling E-Series devices: E71 and E66 gets the FREE navigation, too.

To enjoy free navigation with Ovi Maps on Nokia E71 and Nokia E66 devices, you should follow these simple steps:

1. Download the new Ovi Maps application from nokia.com/maps to your PC
2. Install the application using Ovi Suite to your device
3. Go to applications folder and start using Ovi Maps

source: conversations.nokia

to Download it from the phone directly, use the following link

with your phone:

http://nokia.mobi/maps

other users, who don't get the FREE navigation will be prompted to pay the one year navigation license of 9.99 EUR if they start using the drive and walk navigation.

source: gerrymoth

thanks to Norman John from SymbianWorld.org who mentioned it earlier :-)