Google releases natural language dictionaries – Based around Wikipedia page titles as their list of concepts, Google Research have released a really interesting resource, a bit like a thesaurus for machines. Even better, it's available under a liberal CC BY license, so there should be no problem using it in any sort of project.
Dumb like me – A scary story for anyone who makes their living with their mind, from my friend Russ Jurney; "Smart people, like the very attractive, get special treatment they do not know they are getting". Despite all our techno-utopianism, we're still reliant on a fallible hardware platform made of meat.
NSA's security guide to iOS 5 – A wealth of detailed practical information on securing Apple mobile devices.