Oh yes that mixer would be sweet, +1.
Some of my own suggestions, probably closer to dreaming-in-colour territory:
- Video-out for the gameboy. I know a couple of people have put together rigs that do gameboy-vga; it would be cool to see something like that available as a kit. I know I can use the super gameboy, but it would be nice not to be tethered to the SNES, and maybe we could even get better video quality.
- A more convenient way of getting pictures off of the GB camera would be nice too (make the link port think that a USB connection was a gameboy printer, perhaps? Just like the old madcatz thing, but with USB instead of serial (it could even just be an adapter) and current software.) NeX had a USB gameboy camera at one point, IIRC...
These are just things that are on my mind because I love the GB cam, but my mega memory card refuses to play nice with my EMS cart, and I'm stuck with the super gameboy + capture card for saving my photos at the moment.