It's good to share new ideas. Many people keep ideas to themselves, but if that is where they stay then no-one benefits. People are reluncant to mention new ideas in case someone steals it. What are the chances?
1) - If its a new idea you will need help.
2) - There is more to a business than just the idea. You need drive and determination to make it happen, the idea alone is only the very beginning.
3) - It can form part of your market reseach to test if people like the idea and think its viable. It may help you overcome pitfalls early on or before they happen.
I will post my ideas as and when I have them, so please feel free to comment on them, good or bad.