UPDATE - I now believe this video is a fake - sort of, it's actually showing a LED monitor and not an OLED one. More info here. The video has been removed since, in any case.
First look reviews has released a short video showing Samsung's new 23" OLED Monitor Prototype. Here's a photo first, and some info:
This OLED monitor has got a contrast of 2,000,000:1, is only 1.6cm thick, and should be out in 2010. It is very light, should save around 40% of the energy compared to normal LCDs, and has HDMI and DVI Inputs.