Okay, I'd like to start this off by saying I don't own a Nintendo DS, all I've got is a nice little Gameboy Advance SP. I know most of the flash carts on the market are geared towards the DS. I've looked at several older flash carts for the GBA, but the majority of them aren't for sale anywhere anymore. I took a look at the eLink and EFA, but after reading reviews (especially those for the eLink), I think I want something of a little higher quality. Of the older carts I looked at, the EZ-Flash III looked awesome but I can't find it for sale anywhere (for obvious reasons). Are the new EZ-Flash cards (IV and V) compatible with the GBA? Looking at a lot of these new cards, it seems that most of them are designed for the DS, but also support the GBA. Unfortunately, everything I read about them is from a DS perspective. Someone give me the lowdown on what I should buy if I just want to get started in GBA homebrew, I'd really appreciate it.