I've been following the other plugin suggestion thread for a while. Great initiative, unfortunately it's hard to know if anyone is planning on working on any of those ideas, nor which of the ideas would be the most popular.
So I decided to create a system where you can provide your plugin ideas, and also rate other people's ideas. It will take a bit ot time to have a good database of rated ideas, but that should motivate some coders to focus on the best ideas.
Also, it is not possible here to discuss each idea separatley which makes that thread difficult to follow.
I hope this can be helpfull, come on fill you request here:
Just be aware that there is some NSFW content around.