[Alan Brinton]

I wonder if the melodica shown at the Harmonikas site exists in actuality as opposed to just in concept.

Let’s face it, the technology exists to create a standard melodica (perhaps like the one pictured) that is far superior to any melodica that has heretofore existed, one that is superior to the best, which are relatively ancient: the Clavietta, the Hohner Professional 36, and maybe a few others. This isn’t rocket science, as they say.