I got the 18mm pitch number from palminfocenter, at this url: http://www.palminfocenter.com/news/9...foleo-webcast/

It is the only place I have seen that number. There are also dimensions listed there, 10.55" x 6.67" x 0.94". It's the only source I've seen for a number of stats that should be easy for anyone who's had a hands-on with the device.