Google has suspended the sale of certain wallpaper applications after it was revealed at a hacker conference this week that they collect mobile phone users' personal data. The Wall Street Journal reports that the more than 80 apps sold through Google's Android store collected phone numbers and subscriber identifiers and transmitted the information to an unencrypted server. The security firm Lookout revealed the activity. Lookout CEO John Hering said the application developer notified users that the app would have access to "phone state and identity," but "I don't think most consumers would realize their personal data was being uploaded to a server," he said. (Registration may be required to access this story.)  
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