Using FormsCentral, does it have the capability to (I know that #1 & #2 are capabilities but are #3 ?)
1. sender completes a form,
2. sender submits it to a reviewer
3. the reviewer reviews it for compliance and
4. reviewer sends it back to the sender with comments for revision to bring it into compliance?
Currently FormsCentral doesn't support review and comments workflow like you describes above, but you may share the form with a reviewer to review and edit the form. The "Share and Collaborate" part in this article http://forums.adobe.com/docs/DOC-1413 talks about how to share a file with other.