Has anyone looked at creating a MAPI Zilmet for external accounts?

I know you can turn on the feature in 7.x to allow users to use Zimbra for external Mapi accounts client however I would like to have a Zimlet that would not download the email and only Connect to view, create folders and post items to a external MAPI account. I dont want to eat up local storage nor do I want them to the ability to drag and drop between Zimbra and the external account.