Offline Android GPS Apps

Have you ever been lost in the woods or in a very rural area (think Deliverance) and wished you could use your cell phone as a GPS?  The problem is that without a device with preloaded maps or a data plan you are never going to find you way.

My brother has been wanting to replace his GPS with his droid tablet (w/o data) and has me researching offline GPS applications.  It appears that Android is going to be releasing an offline GPS, but I have not been able to find a clear release date.  In the mean time, I am looking into Co-Pilot Live USA (approx. $20 for offline maps) and there are rumors that TomTom is going to release an app.  I will be researching this more in the future and if you have any other recommendations of good offline android gps applications feel free to comment and leave your reviews.