I also like your idea of a market-niche-locater. I love the writing part, but the searching for a market part takes up a whole lot of time (which I don't have much of) and causes more headaches than writing does. I also wish there was some sort of machine where I could just feed the story into and it would be sent wherever...I suppose that's what agents are good for. But one can't get an agent for short stories (wah).