Arduino library for Graphic LCD Backpack

I’m trying to get my Arduino to interface with the Graphic LCD Backpack that SF sells. I have the 128x64-pixel black and white LCD connected to it. The basic hexadecimal commands are too primitive and awkward for what I’m doing, so what I’m looking for is a library (arduino 1.0.1 compatible) that provides an easy way to do things like print lines, text, etc. to the screen. I imagine something along the lines of this:

// fake code to show what I'm looking for
LCDLibrary.drawLine(0,0,128,64);
LCDLibrary.drawText("Hello World",20,20);

If anyone knows about a library that does something similar, or has an easier way to do it, please let me know where/how I can find/use it.