Hi David,
You can choose which fields to have display and required. The default is to have email as displayed and required. So to change this, you need to select display fields and required fields that you want and do not include the email field. We have this working in our Light-A-Candle connector. Note that without an email, no one can respond and the respond button will not appear.
As for allowing users to edit their request, only logged in users who posted can edit their requests. You should see an "Edit" button for the logged in user who posted. If not, check the template to make sure the template has the ###MODIFY### marker in it.
It is on the To-Do list to handle non-logged in to be able to edit. What is planned, just FYI is -- if they want to edit, they could as long as their session is active. If it not active, then they can click on an "Edit my message(s)" button that they can type in an email and it will send an e-mail. They can then click on a link and edit any messages they have entered. I have thought too of using cookies to save what posts a person has entered.
-Dave