The outfit said tath just about every aspect of this version was different from the final retail release. Instead of featuring the Nintendo DS logo on the boot screen there was a GBA placeholder screen and a sound file of children shouting "Nintendo" which sounds kinda annoying.
The placeholder menu features DS and GBA boot options, wireless play, and Nitro settings - containing user information (console name, birthday and colour), the date and time, language options, touch panel settings and more.
Some DS enthusiasts have also got the firmware up and running on their own units, thanks to Forest of Illusion's efforts:
Nintendo showcased prototypes of the DS at E3, which was at the time internally known as Nitro.