And one more question- do you use the GB/NES emulators? How's compatability with these?
They work, and compatibility is decent, but the main problem is that they are insanely out of date. It's using PocketNES 9.97 and Goomba Color Alpha 6, and both of those emulators have received numerous updates since then. The built-in emulators are not user-upgradeable. I'd suggest downloading the updated versions, creating your own compilations with them (IE, putting the NES/GB roms inside the *.gba file itself rather than copying them straight to your card), running the compiled files through the Supercard patcher with minimal settings applied, and launching them from the SC menu.
EDIT:
QUOTE(Schizoanalysis @ Jun 24 2009, 11:44 AM) I've got an old Flash2Advance Ultra 512 cart -- it's great for loading on a single game -- but the computer software is really quite painful when you load on several games --