By John Gruber
Clerk’s iOS SDK: Authentication and user management for Apple applications.
One example of how UDID device IDs can be de-anonymized. Since this was originally published back in May 2011, OpenFeint has closed the more egregious privacy holes (GPS location, for example), but it still returns information that can be used to identify you. (Via Marco Arment.)
★ Wednesday, 5 September 2012