I have just interfaced a cheapie Nokia 5110 LCD module to the prop for fun.
Wiring it was easy except that my 1"sq CpuBlade (a simple propeller module) does not bring out 3V3. So I needed to improvise and power it separately.
Once working I was able to check the current usage. The LCD was drawing ~0.2mA although it would increase when sending data to it, but not by a large amount. So, I decided to power it with prop pins, one for 3v3 and one for gnd.
I can do the same for the backlight which draws ~6.7mA by connecting a prop pin and outputting 0v. Using pwm will reduce the backlight brightness as fully on is way too bright.
Now I can connect the whole LCD module (8 pins) directly to the prop's 8 I/Os. This means that I can simply stack the module onto my prop board. The same could be done simply on the Parallax Proto boards, and many of the other boards out there!
When powering ICs/modules, be careful that there is no large capacitors on the power rail of the module!!! Capacitors are effectively shorts when initially powered and therefore may draw too much current on power on for the prop pin to handle (typ max ~30mA). This applies to both 3v3 and Gnd pins.
Don't use this method with ICs/modules that have large switching currents as you are likely to induce this switching noise back into the internals of the prop resulting in unwanted internal noise in the prop chip - can cause other internal problems.
I will post a pic soon.