ok, no gba slot...but they added a SD card. kinda useless for music if you have an R4 or edge. BUT, R4 and edge CANT play gba games without that ram expansion pack......so what I'm wondering is someone will find a way to use the SD card as an alternative to the ram expansion....or if thats even possible. (not a hardcore techie, so i wouldn't know). if thats the case, then sure, i guess it would be worth upgrading to if you got the extra 200 lying around. and from what i've already heard, all the makers of R4, egde, NDSTT and everyone else are working on upgrades to work on dsi. time will tell. until then, i'm content with my ds lite and R4.