The Gadget Factory has a new Arduino library that lets you take Arduino code written for LCD displays, change 3 lines of code, and convert it to VGA output:
The VGALiquidCrystal library converts sketches that will run on an HD44780 LCD display to sketches that will run on a VGA moniter. This library is derived from the Arduino LiquidCrystal library and aims to provide maximum compatibility.
Via the contact form.
This library can only be used with the FPGA Papilio. Not a standard Arduino board alone.