I have spent the last few months testing TeleNav and several other navigation programs. For those unfamiliar with it, TeleNav is the program that most of the carriers will provide you for an additional monthly fee. It works with many PDAPhones as well as some regular mobile phones. It stores all its maps and business data on a centralized server and therefore requires a data connection to use it. Version 5.2 of TeleNav has a lot of new features and a totally new user interface and more modern looking screens compared to the older Version 4 that was available for the PPC-6700. You can read the review
HERE.