TomTom Car Kit for iPod Touch - $29.99
Pretty hot deal. Please note that there are some things that you need to do to ensure that it will work with the iTouch 4th gen (latest one with camera).
Pretty much people have to make sure that the location based settings is on, be running the latest version of TomTom, and then put it in a case or something that will hold it in place so that the electrical contact stays connected.
Note that this does not include the TomTom GPS app from the Apple Store.
