I would like to see the ability to set the MIME within the application. From viewing our current source code BVC2004, the MIME types are hard coded. It would seem we have to rebuild the entire site just to get a new MIME type added, much better if a table and a quick form were used for adding and removing MIME types from the application.
Eg.
MIME: .new
MIME type: application/octet-stream

Note: Adding the MIME type to IIS is not sufficient since the eCommerce tool wipes the Response and sets its own MIME types based on hard coded values.