What kind of cost do you expect to charge for this? A problem I have now with some of the form base software is that the charge for multiple users who each create one form is very high, as they charge per user, not based on how many forms the users make.
We don't have a final pricing model figured out yet, but we would like to support applications with a variety of needs. If we had a per-form based pricing option would that meet your needs?
Can you describe your use case a bit and the other platforms you have looked at thus far?
