Lookout’s “App Genome Project” is an ongoing study of the millions of mobile applications available, the user data that they collect, and threats they present. During their research for the project, the team found a series of simple Wallpaper apps in the Android Market which were suspiciously collecting more data than they needed to.
I saw this story reported somewhere else and it had a link to a list of the suspect apps. As soon as I find it I will add it here.
The claims by Lookout has been retracted. The developer was not collecting any personally identifiable data from phones, just unique IDs so that settings could be restored from one phone to another. Here is the story from the Android Guys.