It's both harder and easier than ever to be punk'd on April Fool's Day, thanks to the Internet. With all of our ways of being connected, alerts warning you not to be fooled are everywhere. But then, so are the pranks - it's now customary on this not-quite-special day for major companies, services and personalities to run outlandish claims of inventions, advances and changes. Taken collectively, what emerges is Internet-wide ...