I think a nice addition to your product offerings would be to update Digital File Pro to resize images on upload. Also allow it to upload other files like a PDF and image in the same transaction. This is useful when we have product pages that need to be updated with product shots as well as supplementary PDFs.
We do have image resizing on the list to add to the next version of Digital File Pro. Sorry, but I do not have a time frame on the release of V2.
You can upload multiple file types currently with Digital file Pro. So for the PDF and image case you would have a file field for the PDF and one for the image, then you'd apply the Upload to each of the file fields. Then when the form is submitted both file fields will be processed and the files uploaded.