Thanks for the url. I had searched but had not found.
To summerise, the keyboard will work for most people but not for everybody
One has to install s/w, play with configuration files, and remember to turn on the bluetooth and pair the device and then remember to disconnect the device afterwards (I wonder what would happen at this point if one then tried to reconnect the device after it was not cleanly disconnected).
Stowaway Bluetooth Keyboard : I read that one chap said that this worked very well.
However, he did not meantion the company name! There are lots of Stowaway Bluetooth Keyboards around.
I thought that it would because it supports HID and SPP.