If this was the 1st of April I would assume this was a joke, but Gizmodo has a story about the new Guinness Surger. It seems genuine, it's on the Guinness site.
The idea is you can take a pint of "Guinness Draught Surger Beer" place it on an electronic plate and ultrasonic pulses create the "perfect" head to your pint. How well this actually works is still an open question but there is a video you can look at (I cant watch it on dial-up, though broadband arrives tomorrow). Also I wonder if this only works for a special version of Guinness beer, cause that's always proven so successful for Guinness in the past.