I believe it's going to be something like $1200. Actually, that's all kind of up in the air at the moment. It was originally called the Optimus 113, a full color, fully customizable OLED keyboard. Now I think they scaled back their first model, which is now called the Optimus 103 (I don't know if they cut back on ten keys) which I believe is black and white LED (although still fully customizable). I don't know if that means it's going to be priced lower of it that's what they had to do to hit the $1200 mark.
The cool thing is that the thing is recognized as a usb mass storage device, so once you program it and customize all the keys (and I imagine if it pans out there'l be a key set made by someone for pretty much every popular game and program out there) it's on the keyboard instead of the PC...so you can just plug it into another pc if you need to and go from there.
There's a lot of backlash over the black and white announcement (you know how tech blogs and hardware idiots hype themselves up over something conceptual) but that doesn't change the fact that it'll still be fully functional and a really awesome idea....if you can afford it.
In the meantime I believe the Optimus Mini3 is available for purchase right now (3 big ass color oled buttons which can be used to display widgets, play video, or do a variety of other things) and the Upravlator should be out in the near future (kind of the same concept, but with more buttons so it'll be more functional for applications like photoshop and whatever else).
It's a great idea and a cool technology, but as of right now it's just too expensive. I imagine we won't see it really at the affordable mainstream consumer level for like 4-5 years.