In my new project, I keep hearing about all the people who did it before and stopped. Some pretty big players that are household names. I'm keeping an eye on what they've done and why they had to stop while not getting drawn into the "well, if they did it and failed..." quicksand. There are key new developments that weren't present when the big guys killed their projects so that's what keeps me moving forward.<p>I've also been worrying about the whole "what if I find out someone else has figured this out" thing. I think your post is a swift kick that says to keep an eye out but to spend time building instead of worrying and to keep going if the market supports the innovation. Thanks for the post!