I'm really pleased you like it - thanks for the nice comment. And generally I'm not one to turn down money but we're not looking at a B2C business model at this stage so hoping to keep the form filling side of it always free.

Feel free to drop us an email at support@form.ac and if we ever have to turn off the service I'd be happy to show you how you can set up your own for free on Heroku (or on a local machine if you're familiar with rails).