You say it's not worth cloning, but what about the touchscreen phone UI running on an 11 MHz ARM processor? What was the secret sauce that made that work? Or was it just that a phone UI back then wasn't expected to do as much as one does today?
Ah, here it is:
http://www.fano.co.uk/history/phone.html
Mmm. I don't remember it being quite that brick-like.
Chris Hinsley