After much inquisitiveness and hunting around, I managed to grab a copy of the R4 Nintendo Revolution system, including a 1 gig Micro-SD card fr SGD$58. Here's a pic of it:

It's basically an specially designed NDS card that allows your to transfer *koff*backup*koff* NDS ROMS that are *koff*available-from-you-know-where*koff* to it. Now most of these ROMS range between 32mb to 256mb of space so you can guess how many of these ROMS can be placed into just 1 of these cards. Basically, instead of having just 1 game on 1 game card, you can have MORE than 1 game on this game card.
Before the R4, I had the following games:
Brain Age
Cooking Mama
Big Brain Academy
Elite Beat Agents
After the R4, the following titles have been added to my collection:
Mario Kart DS
Trauma Center - Under the Knife
Picross (really solid logic puzzle!)
New Super Mario Bros (a classic!)
Final Fantasy: Chocobo Tales
New Touch Party Games (a bit boring but 505 games!)
Point Blank DS (lots of mini arcade games)
I tried Rune Factory, which is a fantasy spin-off of Harvest Moon on the GBA but I didn't quite enjoy the farming thingy. Dynasty Warrior DS is a kinda a let-down for me. Brain Age 2 is fun but it's an Euro version so I think I'll wait for the local version (monetary exchange issue in the game).
Off to gaming in the dark on my NDS Lite!