I've already made this request via tickets, and received an interested response from TekGear. I'm posting here because I'm interested to know if other users agree with me.
I think that - rather as with the iPad, initially - in the cordless Twiddler Tekgear have created a machine with a use and potential user-base wider than they realise. This is a machine that allows an entirely historically new form of writing/note-taking - but the last step towards that is to allow untethered chording, directly into the machine.
The main use of the Twiddler will of course continue to be as input for another device. But there are many people (professional writers and others) who want to take notes or compose paragraphs without the interruption of screen, paper, or of voice, while sitting, walking, or whatever. The less mediation between the thought and the taking of the note, the better; which is why note-taking by muscle memory is paradoxically more intimate than by speaking aloud into a recorder (even if you're in a place where to do that isn't embarrassing).
What a handheld chorder ultimately needs, even if as a subsidiary functionality, is the ability to store chorded text to an internal memory in the device itself, to then be downloaded to a computer/iOS device/whatever, and/or uploaded to the cloud, later.
This would not even need any screen - though optimally, later iterations of the Twiddler should include a small display of a line or two of text, through which one could scroll to check spelling etc. But for now if this could be implemented in the Twiddler 3, the point would be that this would be rough, no-checking writing, so misspellings etc could all be fixed after downloading.
This is not a new idea: 35 years ago, one of the very first generation of chorders, the Microwriter, had this very functionality (along with a tiny display of a few words) - and could even print directly if connected to a printer, bypassing a computer altogether. I know for a fact whole books were written on such a machine.
Anyone else tempted?