When we are talking digital ports, can Any digital port be used for ANY digital application? For instance if the Roomba on the Tutorial is using D0 and D1 and I am already using those ports, may I use ANY port, say D14,D15 to do the same thing? Or, should i switch the roomba to D0 and D1 and use D14 , D15 for the Other app?
Thanks,
Mel

I'm pretty darn sure you can flip them to whatever digital port you like.
I've had my sonar on D0/D1- D13/14. I've moved my Sabertooth to pretty much every digital port on the EZ-B.
Roomba can only be on d0