Do I need to worry about licensing (http://developer.android.com/google/play/licensing/adding-licensing.html) on the Google Play store if I am thinking of selling a paid app? Have any of you guys done this?
I dont think you need to worry about it...
No.
But, however its is a licensing drm checks if the user did paid for the app or not (etc a anti piracy thing).
I'm used that for greedy mouse, but will remove that in 1.4, due when I'm implement inapp purchases, which is some sort of drm allready.
So possible to do that, which is all implemented, but was not released to public on the androidextras.