Good UI. I'd say, however (from a business model standpoint), with prices out there in the in-between 'almost free' (see: Amazon's Mechanical Turk; http://aws.a

Good UI. I'd say, however (from a business model standpoint), with prices out there in the in-between 'almost free' (see: Amazon's Mechanical Turk; http://aws.amazon.com/pricing/mturk/ http://aws.amazon.com/pricing/mturk/) and the 'great value' range (see: Survey Monkey; http://www.surveymonkey.com/pricing/details http://www.surveymonkey.com/pricing/details), your per-customer costs might be a touch overly-ambitious. The charity niche is pretty rad tho. You may increase your chances of capturing a piece of the market if you exploit that benefit.