After the 30 day trial is up, you can still use the advanced features for $2.99 per month or $21.99 for a year. Of course, you could decide to pay nothing and still get to use the GPS map and local search functions.
Verizon customers have a special deal with TeleNav that lasts until March 31st. If the service is downloaded onto a Verizon branded Apple iPhone or Android device before that date, 1 year of advanced service will cost $19.99 for a $2 savings.
source: iTunes via IntoMobile