April 18 - 2:05pm EDT   Four European countries are offering DVD movies on a format called DVD-D that is unique in that the content is erased 8 hours after the disposable disc makes its first rotation in a player. The format is also applied to software, with a 48-hour life span, either of which can be kept indefinitely until its first use, at which point the timer starts. Such DVD-Ds are available in Italy, France, Germany and Scandinavia at bookstores, gas stations and kiosks for about a third of the price of a traditional multi-play DVD. [full story]