analog in to 4 bit LCD driver

Hi Rob,
Great!
So it was really my fault for not documenting that tie-low requirement. Ouch. Sorry for the wasted time. I've just now improved the documentation with a wiki page here:
http://www.arduino.cc/playground/Code/LCD4BitLibrary
Please feel free to add corrections and improvements.

Regarding the backlight questions, I haven't used one of those displays but have a look at landon's useful post in this recent thread:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1164517397/3#3

neill