EDIT: Kind of nevermind...The UTFT library doesn't work with the screen I'm using with an SPI (faster) hookup, it only works with it with serial (slow). So, I've decided slowly add the capability for my graphics to be scaled.
These are the graphics drivers the adafruit library seems to work with:
Monochrome Nokia 5110 - expensive monochrome junk for what they are (used to be an awesome bargain though)
SSD1331 - drives tiny oled screens (~$30), but they are oled which is nice - 96x64 .96"
SSD1306 - other small monochrome oled screens - screens are only like $6, but still tiny at .96"
An expensive VFD display that only adafruit sells - ~$96
HX8340B - 2.2" tft lcd's (so, slightly larger than what I'm using now
ILI9325/ILI9328/HX8347 - usually package with delicate touch panels, but cheapish ($20) and easy to find - 2.8" or 3.2" (even slightly larger)
The issue with scaling is that it isn't simply a mater of multiplying. It's close but no cigar. The one 1.8" I'm using is 128x160 and the 2.2"/2.8"/3.2" are all 240x320.
Original thoughts:
I was looking at other LCD's (slightly larger 2.4" and 2.8" and stumbled on this:
http://henningkarlsen.com/electronics/library.php?id=51
It works with a bunch of LCD's and isn't that different than the one I'm using now. The fonts on it might look a little better (I'm going to test this out next time I have a "programming session"). It also has a built in functionality to rotate text, which is kind of interesting. It does not easily read bitmaps from the sd card (I think I can probably get it to work though.)
On the other hand almost everything is written with the other api (the adafruit one). Also, the api I'm using already supports some other LCDs that are larger.
I'm not even sure why I'm looking at larger displays. I think it has something to do with my desire to make this all more modular/plug in what you want, etc. I was also going to rewrite some of the graphics stuff to automatically scale to different LCD sizes (which reminds me that the Karlsen API has the ability to detect the scale of the screen you are using).