Google pulled 10 apps from the Android Market last week after it was notified of a problem by an assistant professor at North Carolina State University. All of the apps were related to Angry Birds (cheats etc.) and this is the third time in recent months that this has happened.
I really do want to see more done in this area, but how easy that will be is difficult to know. The Android Market is huge and maybe impossible to manage in its current form.
More at Computerworld.