I am currently developing credit card software for the Macintosh. This software will allow retail, phone-order and Internet business's to accept credit cards on their Macintosh. As far as I know there hasn't been a stand alone Mac software that could do this since MacAuthorize which went out of business 4 years ago. I am trying to find out what the demand would be for this software. Anyone have any ideas what the best way to test this market would be?