Best Android App So Far (true story).
Free trial: http://ota.telenav.com/ota/tm

I dont' have a navigation system in my car, however I don't think I will ever need one, TeleNav GPS Navigator gives me everything I was expecting it to be, plus more.  There’s a lot of hype around a coming Garmin/Asus phone and rightfully so.  If it ends up anything like this experience, there will be plenty of happy folks out there.

When you first open TeleNav GPS Navigator, you’re given four options: Drive To, Maps & Traffic, Search, and Tools & More.  When you choose Drive to, you can pick from My Favorites, Recent Places, Address, Intersection, City, Business, Airport, or Contact.  I’d like to spend more time trying out the Intersections and Airports.  Unfortunately, I’m not the well-traveled entrepreneur I aspire to be.

I really like the way the app keeps addresses and recent searches handy. You can also do some pre-planning stuff which I hope to try out soon.  Based on what I’ve gathered elsewhere, it will a great feature.

The business search works very well and will find pretty much anything you can think of.

Gas search and weather functions are very convenient however I would prefer to continue using WeatherBug for my forecasts. If you are new to Android and don’t have a dedicated weather app, this should suffice.  You get forecasts at the push of a button as well as weather for destinations too.

WARNING: You will need a car charger if you plan to use this app often.  There’s just no way around it.  It stays on and runs in the background even if you go to the home screen on your phone.  This will surely drain your battery and reduce the already low standby time.

I was concerned whether or not the G1 was a good size screen for GPS functions.  It’s safe to say that this need not be a worry for you as it works good in portrait mode and superb in landscape.  The app uses every bit of the screen possible and nothing seems too small.

The volume and sound quality is great,  and you should have no problem hearing the directions, even if you are listening to music.

Overall, I am very impressed with TeleNav GPS Navigator.  I am more than content to spend $10 a month for the service until the Garmin phone arrives, and possibly beyond.  It’s apps like these that help show off Android and the G1’s capabilities.  The great thing is you don’t have to take my word for it.  You can download a trial version and kick it around for a month. 

And directly from the TeleNav Website here's a list of features:

  • Turn-by-turn driving directions by voice and onscreen.
  • Business Directory with more than 10 million points of interest
  • Full-color 3D maps nationwide
  • Audio traffic alerts and one-click rerouting
  • No more expensive 411 calls

Drive to:

  • 3D moving maps in landscape and portrait mode
  • Name and address speech recognition
  • Automatic reroute if a turn is missed
  • Traffic alerts and one-click rerouting

Search:

  • Business finder
  • Gas by price
  • Search along route
  • Restaurant ratings and reviews

Maps and Traffic:

  • Current location map
  • Business locations map
  • Map, traffic and route summary views

And More:

  • Commute alerts
  • Current weather and five-day forecasts
  • Night-time map color