I have used a borrowed Keyspan 28X USB to serial adaptor and made it work 
for my OS X project. I am looking at buying this same adaptor or else the 
Keyspan 19QW. The 19QW is cheaper and has a PC style serial port which I 
need for my project. With the 19QW  I won't need to make another Mac to PC 
serial cable but can just use a PC cable. 
Has anyone ever used the 19QW?
Are there any known problems with FutureBasic talking to this device?

George Adams