Some Android apps caught covertly sending GPS data to advertisers
"They used TaintDroid to test 30 popular free Android applications selected at random from the Android market and found that half were sending private information to advertising servers, including the user's location and phone number. In some cases, they found that applications were relaying GPS coordinates to remote advertising network servers as frequently as every 30 seconds"
http://arstechnica.com/security/news...dvertisers.ars