DARPA posted a poll on their Facebook page. Here are the results as of about 10:30AM PDT on Dec. 4th:

Capture

Note sure how many people have voted. My vote was 'Never.' Although it occurs to me now that I don't quite know their definition of solved. If they mean when will someone find at least 5 balloons and get the prize, well, that should happen in less than 24 hours. Maybe even less than 6. But I'm betting no one will find all 10.