Samsung Electronics announced today that they began mass producing 22" transparent LCD panels. The panels offer WSXGA+ (1680x1050) resolution and 500:1 contrast. Samsung will produce both color and monochrome panels. The color panel has 15% transparency and the black and white is better at 20%. These LCDs are also very efficient - they use 90% less energy when compared to a normal LCD (because there is no back light unit).
Samsung says that these displays will probably be used as advertising tools (in show windows or outdoor billboards) and education tools. We still do not know the price of these units.
Samsung plans to "lead the global transparent LCD market", and we know that they are also very interested in transparent OLEDs. But no news yet as to when these will hit the market.