Division 6 is shipping Midify, a tiny board that can add a MIDI port to just about anything. 
It’s $35, and can be installed directly into a GBA, GBA-SP, DS or DS Lite, or with some extra parts you can interface it with other devices.
 
Features:

12 outputs
Outputs can be active-high or active-low
Map any MIDI note to any output
Mono [...]

If this isn’t stupidtacular, I just don’t know what is.
Modd3d decided to add MIDI control to his microwave. You can see the results above.
This could come in handy at gigs. Right before you take a break, you could heat up some snacks and maybe makes some blender drinks with a few discreet notes on your [...]