Statements
Every rule has an exception.
This statement is a rule.
Therefore the statement has an exception.
Therefore every rule does not have an exception.
Theorem: All numbers are equal.
Proof: Choose arbitrary a and b, and let t = a + b. Then
a + b = t
(a + b)(a - b) = t(a - b)
a^2 - b^2 = ta - tb
a^2 - ta = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2 = (b - t/2)^2
a - t/2 = b - t/2
a = b
So all numbers are the same, and math is pointless.
This statement is a rule.
Therefore the statement has an exception.
Therefore every rule does not have an exception.
Theorem: All numbers are equal.
Proof: Choose arbitrary a and b, and let t = a + b. Then
a + b = t
(a + b)(a - b) = t(a - b)
a^2 - b^2 = ta - tb
a^2 - ta = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2 = (b - t/2)^2
a - t/2 = b - t/2
a = b
So all numbers are the same, and math is pointless.
With this website you can enter your cube's configuration, and hit solve.
Just because it doesn't exist doesn't mean you don't need it. If you computer case doesn't have enough lights on it to make you happy, then go ahead and put lights on it! (Or better yet build a case out of lights) If you don't have a peephole on your front door, go and grab a drill and make it happen. If your Tivo can't hold all of your favorite shows then add a hard drive and stop complaining. If your car doesn't have an armrest in the middle, then find one in the junkyard and modify it to fit your car. 
You can carry GNU/Linux in your pocket with a functional, quick, and useful USB pen drive distribution. Pen drives are faster than CDs, and the small distros that fit on them don't require huge amounts of memory for the operating system and applications. Slax is a powerful and complete bootable distro based on Slackware, equipped with kernel 2.6, ALSA sound drivers, Wi-Fi card support, X11-6.8.2 with support for many GFX cards and wheel mice, and KDE 3.4 
Free Software for Busy People is a new book from Mohammad Al-Ubaydli, a Bahraini MD who is on a mission to help information-civilians understand why they should use free/open source software. The book tells the story of six people from six walks of life (government administrator, MD, corporate exec, entrepreneur, Arab teacher, primary school teacher) who adopt free software. The book simply and clearly states the case for adopting free software and provides equally clear and simple explanations of how to switch and what to expect when you get there.
Build your own little paper rocket - it comes complete with a pneumatic launch pad. Using pressurized air as it's only fuel, the rocket might rise as high as five meters. No fire and no explosives are used - it's perfectly safe for indoor use. 
The cycle computer sensor is mounted on the circumference of a freely spinning plate (in my case a peanut butter jar lid screwed to a sliding door castor) which is surrounded by three rounded cups (baby food cups, NZ$4 the set) and mounted on a pole (an aluminium towel rail). All parts are either naturally weather-resistant (e.g. plastic or aluminium) or made so (e.g. varnished the wood, used silicone sealant to prevent water getting in). The unit was assembled and then calibrated out the window of a moving car. 
