Every thing has to have a damn camera and hold music now. None of the functions on this thing interest me. The smaller size and better screens are really all it has going.
I think what's most frustrating about this whole DSi thing is that the one really useful, cool feature, the ability to read SD cards, probably could have been backwards engineered into the DS Lite somehow with a special dongle slot in the GBA port or something like that, and then just provide some form of firmware upgrade.
After that, it would have opened up so much in terms of the VIrtual Console stuff that Nintendo wants to do with the DSi.