Long time DF reader, first time poster. I just finished my first android app. It's called Guitar School - a total beginners guide to guitar - from the very basics to learning your first songs. It includes an in-app tuner and tons of audio examples! It's a paid app...only 0.99 cents!
You can find it in the Android Market by searching "Guitar School."
Direct link: http://bit.ly/gYc11E