US Elections ( Total ignorance )

I'm from Europe and I know almost nothing about the U.S. 2008 elections, who are the candidates? how does it works? when will they take place? Who do you think will gonna win?Thanks in advance...

Project Euler (projecteuler.net) - Is there someone registered?

I found these site some weeks ago, it is about solving problems using programming and mathemathical skills. In the home page we can read:"What is Project Euler? Project Euler is a series of...