I have a library for an LCD driven by Software Serial. The command codes are for a PH Anderon controller chip, but they would be trivially easy to edit.
http://www.wulfden.org/downloads/code/arduino/SWSerialLCDPHA_Lib.zip
cheers ... BBR
I must thank everyone so far for their efforts for a unified 8 and 4-bit library, but wouldn't it be prudent to also support a serial version of this new library? I was thinking of just an undertaking...but many wonderful people here have already started and I wouldn't dream of encroaching upon their work 