MP3
Missed opportunity: DSi doesn’t play MP3 files
MP3 files easily account for the lion’s share of digital music. Apple iTune AAC files make up a lot too, but MP3 is still the majority, and you should really be buying from Amazon MP3 now if you aren’t already doing so. So you would think when designing the DSi to play music, Nintendo would support MP3 playback. But they don’t. DSi only supports AAC files. Bummer. Nintendo presid...