Annoying cell phone users (3)
Finally, an answer to annoying cell phone users:  The Society for HandHeld Hushing.  You can download a PDF of a bunch of little business card-sized pieces of paper telling people things like, "Inside voices please" and "Just so you know:  Everyone around you is being forced to listen to yer conversation."  Brilliant.  (via Boing Boing) #technology

Air guitar
Helsinki University of Technology's Air Guitar Project enables any idiot with two hands to be a rockstar.  This is how it works:  "You pull on a pair of orange gloves, press the start pedal, and rock on. Take a playing pose as if you were holding an imaginary guitar - left hand on the guitar's neck, and right hand near your hip."  Like any air guitar idiot, you just move your hands around as if you knew how to play the guitar.  And the good thing is that "You can't play any 'wrong' chords here - they have been pre-selected for you, but it doesn't seem limiting at all. After all, it may only be 4 chords, but that's exactly how many you need to play Smoke on the Water."  As their site says, "Playing air guitar is like playing rock guitar, only without an actual instrument, or musical skills...All you need is a pair of orange gloves and a rock'n'roll attitude."  Well said.  (via News of the Weird) #entertainment

Mathematical photography
This website is a collection of mathematical photography, which is basically just framed pictures of equations.  You have to be a special kind of person to like this stuff.  (via Boing Boing) #math

Year 2038 problem
Similar to the Y2K problem, the Year 2038 problem will affect computers and computer systems that have something to do with a Unix-like operating system.  Unix "time" began on January 1, 1970 (called the Unix Epoch) and is represented by a 32-bit signed (±) integer.  The latest time this integer can represent (determined by the largest number that can be represented by 32 bits) is January 19, 2038, at which point time will stop and the universe will melt.  Actually, it'll probably have about the same impact as the Y2K problem, except that we have over 30 years to prepare for it.  The problem can be relatively easily solved by using a 64-bit integer to represent time, which will give us about 290 billion years to prepare for its demise.  The problem with that is that there are quite a few 32-bit systems out there right now, and there aren't very many 64-bit ones.  I'm sure things will all work out when the time comes. #technology