This is so recognizable. I once went on an intake at an prospect client. They wanted a website with a webapplication for a daycare centre for kids. The application 'only' had to hold all the information (a easy database). Both the ladies didn't had a clue of what they wanted, and for me at that point it was also not clear... Finally when I was completely finished it was a complete billing system with automatic mail and bill sending. For that moment an state of the art application, but a big scope-creeper.. And the sucker I am, I didn't want to put the ladies in huge costs, so it costed me a lot of time and for that time thus money.... So I've been there and know exactly what you mean... :)