I’ve been reading Firespotting pretty regularly for the last few weeks. The idea is ideas. You read the ideas and rate them. If you have an idea that you’d like someone to develop, you put it on the list. Good ideas bubble to the top and bad ones fall off the bottom. There is also a time factor so that ideas are constantly new.
The ideas are mostly technical rather than practical. Some are silly, some are impossible, some are diabolically clever. I look every day for an idea that I can implement, or an inspiration for a better idea.
Right now there is a problem that not enough people are adding new ideas and rating ideas. I think if this ever took off in a big way, people like me would be mining it regularly for the next big thing.