For anyone interested, there's a very cheap backlit graphic LCD display available from Sparkfun. I'm planning on using one in a project of mine, so I wrote a simple object to initialize it and display text.
The documentation from them is kind of sparse, so this is a mash-up of a bunch of different C & C# sources I found online, converted to Spin. It's fast enough for my needs, and doesn't take a dedicated cog. Displaying a single character takes ~188,000 clock cycles.
The display itself can be found here: http://www.sparkfun.com/products/10168
The image below is the output of the "sample usage" code.