Well, I'm just going to have faith that Google will fix the stats issue. Go Google! Now working on a way to purchase addons directly from with Say Cheese. This seems like possibly a better approach than packaging the content into separate install packages. This will also let us activate advanced features such as filters. So I'll put the Android In-App purchase feature through its paces.
Ok, you could write a book on this subject. I'll post some programming tips that cut through the clutter.
One of the bad things I've noticed and in all the samples and live applications using inapp purchases, is that they leave a dangling background service running. None of the sample code stops the background service when you leave the activity that launches it. Also, you will need two phones to test this because you cannot make purchases from your own developer account in the app you publish.