Yes

Goto the App Store

Click on Updates

Your application updates should be listed (if any)

To be able to use the application and get updates.

Yes, there is. The application updates maps frequently, calculates the approximate time needed to reach the destination, frequent traffic updates, and speed cameras. The application is not free and must be bought from a store, or online.

Twhirl is a free downloadable application that runs on Adobe Air. It connects to your Twitter account (and some other services) and gives you audible updates. It also lets you post to Twitter.

you have yo wait until the new updates come up in the application store