Actually, I do have a prototype; I'm just not ready to release it yet. So, it's probably best to interpret this as a general discussion of the subject.

Yeah, I was really just letting my thoughts out in an almost stream-of-consciousness style. I posted to HN more just to see how the process works than because I thought people would actually read my post. After 9000 views (from both here and reddit) and some excellent feedback, though, I see that there is some interest in this type of thing. My next post should definitely have more substance to it.