AT&T Accidentally Provides Free Wi-Fi To All
SecureThroughObscure writes tells us about a hack broken by MacOSRumors: you can get free Wi-Fi at Starbucks, Barnes & Noble, and other AT&T hotspots if you know how to set your browser's user agent string (trivial on Safari), and know a valid iPhone phone number. ZDNet blogger Nate McFeters gives some more details and links. This can't last.
Even if every /.'er did this, it still would be a drop in a bucket compared to the number of folks who happily pay the fee.
For example, many pay wifi points can be circumvented just by connecting to a VPN over UDP (since they're only filtering TCP requests). I doubt they're going broke due to that issue though..