Does this idea exist and who wants it?
SingAlong: So if you are going to make profit out of a site built on top of the Flickr API, then you'll have to use the commercial API. So the factors to consider would include the cost of the commercial API too. Besides, you'll also have to use some merchant account/Paypl to process payments which again eats off a bit of the money you get out of your commission you get out of letting people sell the pics.This idea would automatically turn a amateur photographer's or artist's flickr account into something the person can make a profit by selling his best stuff. That would atleast fund upgrading his cameras or buy new colors. You could start by targeting amateur photographers and artists. But make sure you find an extra stream of revenue apart from sales commission.But idea is sweet.