Google Maps Navigation. Today Google saw fit to bring Navigation to Android 1.6, also known as Donut.
This brings free, easy to use, voice guided, turn-by-turn GPS navigation to all those with a G1 or MyTouch, and hopefully soon to other Android devices which are still running 1.5 (like the Hero and Eris).
I haven't fully tested it yet, but I'll report back with my review tomorrow. I am very excited about this and can't wait to try it out. Now, with the money I saved by not buying a Droid, I think I shall have to invest in a car mount for my G1... :-)
Read more at Engadget and TmoNews.