I just did a megasuirt install and used a zetronic WB..i tried to use a port replicator with the WB, but it didnt work. The port replicator is basically like a serial-usb adaptor, but not too sure otherwise on what will work..others may have more info for you.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)