I found a turn by turn Navigation app made by Wisepilot. It uses Navteq and Bing maps data. Anyone ever heard of it or used it? It's priced at $19.99 in the app stored.
they have a trial for blackberry phones. it was the only good navigation app there and it's even better for windows phone 8
let me know how you like it in case you decide to buy it. I have had no issues so far