The CYBER Familator Lite is an Akihabara-esque gizmo that snaps onto your DS Lite and lets you play old Famicom cartridges on your DS screen (If you can hunt down an adapter, you can play NES games as well). I think we should forget the Familator Lite is bigger than the DS, and that an emulator can do the same thing, because you get real 8-bit goodness on your DS. It's like drinking Coke in a glass bottle – it just tastes better. The CYBER Familator Lite is expected to surface in Japan next month. [CYBER Gadget via DS Fanboy via Technabob]
It's true that there are software emulators out there, but none of them for the DS have 100% compatibility, and even ignoring that fact you have to have a medium for loading them on the DS in the first place, though I'll grant that they're inexpensive and easy to find.