Ideas to change the world.
Some interesting things It talks about car commuter tokens, to skip swap shops to limited duration marriages to by choice income tax
(This remind me if you asked Dave Gorman he might say that "All freight on the canals" would make a better world)

Rubiks cubes
I have been trying to write a program to solve a Rubiks cube I was bought last year. Stupidly I thought this would be easy but of course the state space is huge. Coping with the corners is easy enough (7!/4 combinations) but the edge pieces have 11! Arrangements and then you can consider that edge pieces can be in the wrong orientation (i.e. right place but colours in the wrong place).
I found two interesting solutions here and here. These people are just too brainy :-)

Techie article
Working out which compiler options are optimal using genetic algorithm's
And another about some more new processors and why transmeta code morphing software is possibly a bad idea. If you need to know one thing about microprocessors it is that the memory system that they have is the one thing that influences their performance the most. A modern processor is always waiting for memory access and everything that the microprocessor architects do is trying to hide that latency.

"The Physics Diet" seems to completely mirror my belief about food. I would be the first person to have 1 tablet a day. This is not to say I don't like good food but I do dislike the everyday effort that goes into preparing food and eating it (but luckily after this a dishwasher solves the rest of the problem)