@Ben – so far, the site seems to be working. To answer your question, we do allow the asker to split the prize money among answerers. In fact, so far the majority of settled questions have seen the prize money split among multiple answerers.

How are you going to make it work? Do you pay on receipt of a correct answer? If so, do you only pay the full amount to the last comment that contained the final piece of the answer puzzle? Or do you distribute it across all the helpful comments that lead to the answer?

Or, do you pay someone who convinces you they have the answer? In which case it becomes another bid based site like RentACoder, GetAFreelancer, Guru, etc.

Just food for thought – In principal I like the idea.