I'm also wondering who exactly would use this service. Any worthy developer should be able to read a description / paper on an algorithm he needs and then imple

I'm also wondering who exactly would use this service. Any worthy developer should be able to read a description / paper on an algorithm he needs and then implement it in their language of choice. Also, a bulk of the work would probably go to massaging your input to satisfy the input constraints of this web service. If you go that far, you might as well implement the rest of the algorithm yourself. Maybe instead of an Amazon-style store, it could be more of craigslist/elance/topcoder type of store – people submit the exact classes/data/input they have, with the desired output. Developers write code (and the platform checks input/output validity), and the submitter can then haggle with the coder with the best score for the fee to pay. I guess it could be used as an outsourcing tool for companies that can't be bothered or don't have the brains to develop these kinds of things. Just an idea.