Hello World in Different 'Languages'

I am interested in learning different computer languages and I know that I would not have the time to learn them all by reading books. I am guessing a lot of people in Hacker News would feel the same. So I created Usynk (USynchronize) using Pligg, where people can submit their code, link to a demo and a brief explanation of the code in the language of their choice.We will start from the basic "Hello World" app to more complex ones as time passes by. Users vote on the best submissions (for that particular 'step') and we will move on to the next -slightly more complex example (which would build upon on the previous example), which again gets voted, and it continues until we feel comfortable with that particular language.The example codes are to be submitted with the agreement that it could be used by anyone for doing anything, completely free. What better place to link to this site than at Hacker News? C'mon guys, let us see why you like your language so much?