Andrew Auernheimer, a key member of the Goatse Security group that recently went public with its exploitation of an AT&T security hole that exposed the email addresses of tens of thousands iPad with Wi-Fi + 3G customers, has been arrested on a number of unrelated felony charges. Cnet reports that Auernheimer was arrested following the execution of a FBI search warrant, and is charged with four felony counts of possession of a controlled substance…