I know this is an old post, but I am glad I read it - I hadn't seen that articles. It is amazing to me that people can still come up with new ideas that make them money today. Seems like all the good ideas are already gone sometimes
Actually, for me it seems like they're all gone, all the time :p I always feel like I've got a really good idea - but I can't think quite of how to do it or if it would work - wham. Someone comes out with it and hits the nail on the head. Sucks sometimes really.