I have picked up a GBA SP for Christmas, got a good deal on the system with Super Mario 3. But I can't help thinking I should return it and get a DS when they ship. Things that will help me decide, 1. Does anyone know if the DS will play old GB games? It only states GBA games on the web site. I like the fact that the GBA SP will play all the old GB games, even GB colour. 2. Does anyone know the form factor, I really like the portability of the GBA SP, it is tiny. Can anyone shed any light on these 2 items for me. One positive thing about this is that at least with not being sure if I am going to keep the GBA SP, it has helped me to not open it before Christmas.