Okay, the Jive Forms Add-On is not for the faint of heart. While it isn't rocket science, it is pretty close in the world of Jive. The Forms Add-On offers one the ability to generate a Form that users can fill in and create a resulting Jive Document, Discussion, Question or Private Message. You then get all the benefits of the aforementioned content types in the context of Jive (search/approvals/tags/etc.)
To get started you need to first install the Add-On.