ComputerVoltageSources

i'm not really up on what's going on with the concept, having caught 
the beginning of this thread on sdiy and then lost it until a day or 
two ago when i learned it had moved here. i have what may be regarded 
as a few dumb questions.

- does it have to be rs232 for the computer interface?

i've not seen a serial interface other than usb or firewire on a Mac 
in living memory, and i'd be surprised if it survives on PCs for much 
longer. however, MIDI's going to be around for a while yet, and 
presumably USB for a while longer. can we have one of those instead?

- larry's PSIM layouts look pretty good. are all 8 inputs etc that 
people are talking about necessary or even supportable by the 
hardware platform? 5U MOTM is pretty damn big!

as a software tweak and hardware klutz i'm kinda looking forward to a 
module i can tweak...

thanks,
j