Just pulled the trigger on one of these.
[ Attachment Invalid Or Does Not Exist ] 38914[/ATTACH]
It's a chording keyboard, you press combinations of keys instead of a dedicated key per letter. Not too far removed from the twiddler, but looks easier to hold.
You tube thingy
[video=youtube;KM-4wWaF7To]http://www.youtube.com/watch?v=KM-4wWaF7To&feature=youtu.be[/video]
I'll post more when it arrives...
ebay