Just noticed this re-reading the thread.. regarding speeds:

1. In your best estimation, how much of a usable display would be expected from a 115,200 baud connection?

You can do graphics at 115,200 BPS

If we're talking about the tiny display foxtrot's using (and Hugo posted pics of), it only runs at 19,200bps max (unless Hugo releases whatever hackery he does to get it faster)... The 3100/3900-series is 38,400, and the 7000-series is 115,200.

Even the primitive drawing that I have now is fast enough to be useful for non-vidual info modes.