So here are some pics, taken from my DSi ( because I'm poor and a bastard and cannot afford a real camera ).
Compared to the PS3 Netflix, it is a tiny bit different. I don't want to say that its slightly better, because they are the same thing, but I do want to say that it is easier to go browse around compared to the 360 and PS3 Netflix.
Also, the controller has little functions. Control Pad does navigation, 1 button plays, B button goes back...and so on.
The video quality is that of streamed DVD quality, so what can you expect? If you have Netflix and a Wii, or know someone that has a Wii, make sure to get yourself your free disc!