The hot-or-not equivalent of the design and marketing world, Concept Feedback allows marketers to upload their ad/web/product concept to be judged by their peers and members of the public.
I was initially sceptical about this sort of thing - "ideas by jury" can often be lacklustre. Once everyone has had their say about what they don't like, the remaining bit of idea is often rather bland. Like comedy shows on BBC1.
Anyway, Concept Feedback is actually rather interesting - it is not just an X-Factor style voting system, rather it is more about the design and marketing community giving each other a leg up. The comments tend to be constructive, with professionals offering suggestions about how the concept could be improved. A reputation score system ensures that more weight can be allocated to the more constructive pieces of criticism.
For small businesses who might not be able to afford more expensive feedback avenues, this seems like a great idea.
